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Finding the Fourth Proportional to 527.18, 727.50 and 306.20

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Solution

The fourth proportional to 527.18, 727.50 and 306.20 is: 422.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    527.18 : 727.50 = 306.20 : x
  2. Step 2: Convert to fraction form
    527.18/727.50 = 306.20/x
  3. Step 3: Cross multiply
    527.18x = 727.50 × 306.20
  4. Step 4: Simplify right side
    527.18x = 222,760.50
  5. Step 5: Solve for x
    x = 222,760.50/527.18
  6. Step 6: Final answer
    x = 422.55

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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.