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Finding the Fourth Proportional to 521,607.30, 781,244.55 and 402,893.70

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Solution

The fourth proportional to 521,607.30, 781,244.55 and 402,893.70 is: 603,439.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,607.30 : 781,244.55 = 402,893.70 : x
  2. Step 2: Convert to fraction form
    521,607.30/781,244.55 = 402,893.70/x
  3. Step 3: Cross multiply
    521,607.30x = 781,244.55 × 402,893.70
  4. Step 4: Simplify right side
    521,607.30x = 314,758,507,354.34
  5. Step 5: Solve for x
    x = 314,758,507,354.34/521,607.30
  6. Step 6: Final answer
    x = 603,439.61

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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.