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Finding the Fourth Proportional to 352,172.64, 485,702.64 and 231,221.28

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Solution

The fourth proportional to 352,172.64, 485,702.64 and 231,221.28 is: 318,891.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,172.64 : 485,702.64 = 231,221.28 : x
  2. Step 2: Convert to fraction form
    352,172.64/485,702.64 = 231,221.28/x
  3. Step 3: Cross multiply
    352,172.64x = 485,702.64 × 231,221.28
  4. Step 4: Simplify right side
    352,172.64x = 112,304,786,120.18
  5. Step 5: Solve for x
    x = 112,304,786,120.18/352,172.64
  6. Step 6: Final answer
    x = 318,891.29

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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.