Home / 486,943.20-730,414.80-318,981.60

Finding the Fourth Proportional to 486,943.20, 730,414.80 and 318,981.60

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Solution

The fourth proportional to 486,943.20, 730,414.80 and 318,981.60 is: 478,472.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,943.20 : 730,414.80 = 318,981.60 : x
  2. Step 2: Convert to fraction form
    486,943.20/730,414.80 = 318,981.60/x
  3. Step 3: Cross multiply
    486,943.20x = 730,414.80 × 318,981.60
  4. Step 4: Simplify right side
    486,943.20x = 232,988,881,567.68
  5. Step 5: Solve for x
    x = 232,988,881,567.68/486,943.20
  6. Step 6: Final answer
    x = 478,472.40

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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.