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Finding the Fourth Proportional to 689,242.88, 951,198.72 and 387,456.32

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Solution

The fourth proportional to 689,242.88, 951,198.72 and 387,456.32 is: 534,714.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,242.88 : 951,198.72 = 387,456.32 : x
  2. Step 2: Convert to fraction form
    689,242.88/951,198.72 = 387,456.32/x
  3. Step 3: Cross multiply
    689,242.88x = 951,198.72 × 387,456.32
  4. Step 4: Simplify right side
    689,242.88x = 368,547,955,639.91
  5. Step 5: Solve for x
    x = 368,547,955,639.91/689,242.88
  6. Step 6: Final answer
    x = 534,714.20

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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.