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Finding the Fourth Proportional to 409.46, 613.88 and 178.17

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Solution

The fourth proportional to 409.46, 613.88 and 178.17 is: 267.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    409.46 : 613.88 = 178.17 : x
  2. Step 2: Convert to fraction form
    409.46/613.88 = 178.17/x
  3. Step 3: Cross multiply
    409.46x = 613.88 × 178.17
  4. Step 4: Simplify right side
    409.46x = 109,372.47
  5. Step 5: Solve for x
    x = 109,372.47/409.46
  6. Step 6: Final answer
    x = 267.12

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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.