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Finding the Fourth Proportional to 410.59, 615.95 and 205.12

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Solution

The fourth proportional to 410.59, 615.95 and 205.12 is: 307.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    410.59 : 615.95 = 205.12 : x
  2. Step 2: Convert to fraction form
    410.59/615.95 = 205.12/x
  3. Step 3: Cross multiply
    410.59x = 615.95 × 205.12
  4. Step 4: Simplify right side
    410.59x = 126,342.64
  5. Step 5: Solve for x
    x = 126,342.64/410.59
  6. Step 6: Final answer
    x = 307.71

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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.