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Finding the Fourth Proportional to 689,388, 951,355.39 and 387,582

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Solution

The fourth proportional to 689,388, 951,355.39 and 387,582 is: 534,863.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,388 : 951,355.39 = 387,582 : x
  2. Step 2: Convert to fraction form
    689,388/951,355.39 = 387,582/x
  3. Step 3: Cross multiply
    689,388x = 951,355.39 × 387,582
  4. Step 4: Simplify right side
    689,388x = 368,728,224,766.98
  5. Step 5: Solve for x
    x = 368,728,224,766.98/689,388
  6. Step 6: Final answer
    x = 534,863.13

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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.