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Finding the Fourth Proportional to 689,712.08, 951,793.32 and 387,906.08

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Solution

The fourth proportional to 689,712.08, 951,793.32 and 387,906.08 is: 535,305.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,712.08 : 951,793.32 = 387,906.08 : x
  2. Step 2: Convert to fraction form
    689,712.08/951,793.32 = 387,906.08/x
  3. Step 3: Cross multiply
    689,712.08x = 951,793.32 × 387,906.08
  4. Step 4: Simplify right side
    689,712.08x = 369,206,415,731.39
  5. Step 5: Solve for x
    x = 369,206,415,731.39/689,712.08
  6. Step 6: Final answer
    x = 535,305.13

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1.5x scale

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.