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Finding the Fourth Proportional to 641,859.92, 885,705.24 and 355,369.52

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Solution

The fourth proportional to 641,859.92, 885,705.24 and 355,369.52 is: 490,375.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,859.92 : 885,705.24 = 355,369.52 : x
  2. Step 2: Convert to fraction form
    641,859.92/885,705.24 = 355,369.52/x
  3. Step 3: Cross multiply
    641,859.92x = 885,705.24 × 355,369.52
  4. Step 4: Simplify right side
    641,859.92x = 314,752,646,000.29
  5. Step 5: Solve for x
    x = 314,752,646,000.29/641,859.92
  6. Step 6: Final answer
    x = 490,375.92

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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.