Home / 926,881.80-1,390,322.70-643,446.60

Finding the Fourth Proportional to 926,881.80, 1,390,322.70 and 643,446.60

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Solution

The fourth proportional to 926,881.80, 1,390,322.70 and 643,446.60 is: 965,169.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    926,881.80 : 1,390,322.70 = 643,446.60 : x
  2. Step 2: Convert to fraction form
    926,881.80/1,390,322.70 = 643,446.60/x
  3. Step 3: Cross multiply
    926,881.80x = 1,390,322.70 × 643,446.60
  4. Step 4: Simplify right side
    926,881.80x = 894,598,414,217.82
  5. Step 5: Solve for x
    x = 894,598,414,217.82/926,881.80
  6. Step 6: Final answer
    x = 965,169.90

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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.