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Finding the Fourth Proportional to 527.62, 727.94 and 306.49

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Solution

The fourth proportional to 527.62, 727.94 and 306.49 is: 422.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    527.62 : 727.94 = 306.49 : x
  2. Step 2: Convert to fraction form
    527.62/727.94 = 306.49/x
  3. Step 3: Cross multiply
    527.62x = 727.94 × 306.49
  4. Step 4: Simplify right side
    527.62x = 223,105.28
  5. Step 5: Solve for x
    x = 223,105.28/527.62
  6. Step 6: Final answer
    x = 422.85

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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.