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Finding the Fourth Proportional to 475.47, 712.72 and 330.88

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Solution

The fourth proportional to 475.47, 712.72 and 330.88 is: 495.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    475.47 : 712.72 = 330.88 : x
  2. Step 2: Convert to fraction form
    475.47/712.72 = 330.88/x
  3. Step 3: Cross multiply
    475.47x = 712.72 × 330.88
  4. Step 4: Simplify right side
    475.47x = 235,824.79
  5. Step 5: Solve for x
    x = 235,824.79/475.47
  6. Step 6: Final answer
    x = 495.98

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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.