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Finding the Fourth Proportional to 689,347.72, 951,388.50 and 387,600.04

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Solution

The fourth proportional to 689,347.72, 951,388.50 and 387,600.04 is: 534,937.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,347.72 : 951,388.50 = 387,600.04 : x
  2. Step 2: Convert to fraction form
    689,347.72/951,388.50 = 387,600.04/x
  3. Step 3: Cross multiply
    689,347.72x = 951,388.50 × 387,600.04
  4. Step 4: Simplify right side
    689,347.72x = 368,758,220,655.54
  5. Step 5: Solve for x
    x = 368,758,220,655.54/689,347.72
  6. Step 6: Final answer
    x = 534,937.90

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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.