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Finding the Fourth Proportional to 410.17, 615.31 and 136.20

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Solution

The fourth proportional to 410.17, 615.31 and 136.20 is: 204.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    410.17 : 615.31 = 136.20 : x
  2. Step 2: Convert to fraction form
    410.17/615.31 = 136.20/x
  3. Step 3: Cross multiply
    410.17x = 615.31 × 136.20
  4. Step 4: Simplify right side
    410.17x = 83,805.22
  5. Step 5: Solve for x
    x = 83,805.22/410.17
  6. Step 6: Final answer
    x = 204.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.