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Finding the Fourth Proportional to 640,691.50, 884,007.30 and 382,518.14

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Solution

The fourth proportional to 640,691.50, 884,007.30 and 382,518.14 is: 527,787.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,691.50 : 884,007.30 = 382,518.14 : x
  2. Step 2: Convert to fraction form
    640,691.50/884,007.30 = 382,518.14/x
  3. Step 3: Cross multiply
    640,691.50x = 884,007.30 × 382,518.14
  4. Step 4: Simplify right side
    640,691.50x = 338,148,828,142.42
  5. Step 5: Solve for x
    x = 338,148,828,142.42/640,691.50
  6. Step 6: Final answer
    x = 527,787.29

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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.