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Finding the Fourth Proportional to 315,519.32, 435,414.48 and 172,279.28

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Solution

The fourth proportional to 315,519.32, 435,414.48 and 172,279.28 is: 237,744.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,519.32 : 435,414.48 = 172,279.28 : x
  2. Step 2: Convert to fraction form
    315,519.32/435,414.48 = 172,279.28/x
  3. Step 3: Cross multiply
    315,519.32x = 435,414.48 × 172,279.28
  4. Step 4: Simplify right side
    315,519.32x = 75,012,893,115.97
  5. Step 5: Solve for x
    x = 75,012,893,115.97/315,519.32
  6. Step 6: Final answer
    x = 237,744.22

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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.