Home / 1,328,878,876.70-1,993,318,315.05-638,619,686.30

Finding the Fourth Proportional to 1,328,878,876.70, 1,993,318,315.05 and 638,619,686.30

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Solution

The fourth proportional to 1,328,878,876.70, 1,993,318,315.05 and 638,619,686.30 is: 957,929,529.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328,878,876.70 : 1,993,318,315.05 = 638,619,686.30 : x
  2. Step 2: Convert to fraction form
    1,328,878,876.70/1,993,318,315.05 = 638,619,686.30/x
  3. Step 3: Cross multiply
    1,328,878,876.70x = 1,993,318,315.05 × 638,619,686.30
  4. Step 4: Simplify right side
    1,328,878,876.70x = 1,272,972,317,053,275,392
  5. Step 5: Solve for x
    x = 1,272,972,317,053,275,392/1,328,878,876.70
  6. Step 6: Final answer
    x = 957,929,529.45

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Half scale
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Double scale
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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.