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Finding the Fourth Proportional to 410.55, 615.72 and 204.97

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Solution

The fourth proportional to 410.55, 615.72 and 204.97 is: 307.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    410.55 : 615.72 = 204.97 : x
  2. Step 2: Convert to fraction form
    410.55/615.72 = 204.97/x
  3. Step 3: Cross multiply
    410.55x = 615.72 × 204.97
  4. Step 4: Simplify right side
    410.55x = 126,204.13
  5. Step 5: Solve for x
    x = 126,204.13/410.55
  6. Step 6: Final answer
    x = 307.40

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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.