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Finding the Fourth Proportional to 527.28, 727.66 and 439.80

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Solution

The fourth proportional to 527.28, 727.66 and 439.80 is: 606.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    527.28 : 727.66 = 439.80 : x
  2. Step 2: Convert to fraction form
    527.28/727.66 = 439.80/x
  3. Step 3: Cross multiply
    527.28x = 727.66 × 439.80
  4. Step 4: Simplify right side
    527.28x = 320,024.87
  5. Step 5: Solve for x
    x = 320,024.87/527.28
  6. Step 6: Final answer
    x = 606.94

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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.