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Finding the Fourth Proportional to 410.76, 615.81 and 205.22

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Solution

The fourth proportional to 410.76, 615.81 and 205.22 is: 307.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    410.76 : 615.81 = 205.22 : x
  2. Step 2: Convert to fraction form
    410.76/615.81 = 205.22/x
  3. Step 3: Cross multiply
    410.76x = 615.81 × 205.22
  4. Step 4: Simplify right side
    410.76x = 126,373.45
  5. Step 5: Solve for x
    x = 126,373.45/410.76
  6. Step 6: Final answer
    x = 307.66

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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.