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Finding the Fourth Proportional to 486,935.70, 730,403.55 and 318,974.10

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Solution

The fourth proportional to 486,935.70, 730,403.55 and 318,974.10 is: 478,461.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,935.70 : 730,403.55 = 318,974.10 : x
  2. Step 2: Convert to fraction form
    486,935.70/730,403.55 = 318,974.10/x
  3. Step 3: Cross multiply
    486,935.70x = 730,403.55 × 318,974.10
  4. Step 4: Simplify right side
    486,935.70x = 232,979,814,998.06
  5. Step 5: Solve for x
    x = 232,979,814,998.06/486,935.70
  6. Step 6: Final answer
    x = 478,461.15

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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.