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Finding the Fourth Proportional to 410.45, 615.69 and 136.56

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Solution

The fourth proportional to 410.45, 615.69 and 136.56 is: 204.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    410.45 : 615.69 = 136.56 : x
  2. Step 2: Convert to fraction form
    410.45/615.69 = 136.56/x
  3. Step 3: Cross multiply
    410.45x = 615.69 × 136.56
  4. Step 4: Simplify right side
    410.45x = 84,080.42
  5. Step 5: Solve for x
    x = 84,080.42/410.45
  6. Step 6: Final answer
    x = 204.85

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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.