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Finding the Fourth Proportional to 475.28, 711.20 and 289.52

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Solution

The fourth proportional to 475.28, 711.20 and 289.52 is: 433.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    475.28 : 711.20 = 289.52 : x
  2. Step 2: Convert to fraction form
    475.28/711.20 = 289.52/x
  3. Step 3: Cross multiply
    475.28x = 711.20 × 289.52
  4. Step 4: Simplify right side
    475.28x = 205,906.62
  5. Step 5: Solve for x
    x = 205,906.62/475.28
  6. Step 6: Final answer
    x = 433.23

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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.