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Finding the Fourth Proportional to 409.55, 613.86 and 178.55

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Solution

The fourth proportional to 409.55, 613.86 and 178.55 is: 267.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    409.55 : 613.86 = 178.55 : x
  2. Step 2: Convert to fraction form
    409.55/613.86 = 178.55/x
  3. Step 3: Cross multiply
    409.55x = 613.86 × 178.55
  4. Step 4: Simplify right side
    409.55x = 109,604.70
  5. Step 5: Solve for x
    x = 109,604.70/409.55
  6. Step 6: Final answer
    x = 267.62

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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.