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Finding the Fourth Proportional to 397.52, 549.08 and 280.88

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Solution

The fourth proportional to 397.52, 549.08 and 280.88 is: 387.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.52 : 549.08 = 280.88 : x
  2. Step 2: Convert to fraction form
    397.52/549.08 = 280.88/x
  3. Step 3: Cross multiply
    397.52x = 549.08 × 280.88
  4. Step 4: Simplify right side
    397.52x = 154,225.59
  5. Step 5: Solve for x
    x = 154,225.59/397.52
  6. Step 6: Final answer
    x = 387.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.