Home / 1,121,238,109.70-1,681,857,164.55-538,831,917.80

Finding the Fourth Proportional to 1,121,238,109.70, 1,681,857,164.55 and 538,831,917.80

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Solution

The fourth proportional to 1,121,238,109.70, 1,681,857,164.55 and 538,831,917.80 is: 808,247,876.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121,238,109.70 : 1,681,857,164.55 = 538,831,917.80 : x
  2. Step 2: Convert to fraction form
    1,121,238,109.70/1,681,857,164.55 = 538,831,917.80/x
  3. Step 3: Cross multiply
    1,121,238,109.70x = 1,681,857,164.55 × 538,831,917.80
  4. Step 4: Simplify right side
    1,121,238,109.70x = 906,238,321,440,146,560
  5. Step 5: Solve for x
    x = 906,238,321,440,146,560/1,121,238,109.70
  6. Step 6: Final answer
    x = 808,247,876.70

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Half scale
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Double scale
Find fourth proportional to 1,121,238,110.70, 1,681,857,166.05 and 538,831,918.80
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.