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Finding the Fourth Proportional to 463,487.68, 639,901.92 and 318,543.04

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Solution

The fourth proportional to 463,487.68, 639,901.92 and 318,543.04 is: 439,787.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    463,487.68 : 639,901.92 = 318,543.04 : x
  2. Step 2: Convert to fraction form
    463,487.68/639,901.92 = 318,543.04/x
  3. Step 3: Cross multiply
    463,487.68x = 639,901.92 × 318,543.04
  4. Step 4: Simplify right side
    463,487.68x = 203,836,302,898.64
  5. Step 5: Solve for x
    x = 203,836,302,898.64/463,487.68
  6. Step 6: Final answer
    x = 439,787.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.