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Finding the Fourth Proportional to 316.71, 475.30 and 239.77

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Solution

The fourth proportional to 316.71, 475.30 and 239.77 is: 359.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.71 : 475.30 = 239.77 : x
  2. Step 2: Convert to fraction form
    316.71/475.30 = 239.77/x
  3. Step 3: Cross multiply
    316.71x = 475.30 × 239.77
  4. Step 4: Simplify right side
    316.71x = 113,962.68
  5. Step 5: Solve for x
    x = 113,962.68/316.71
  6. Step 6: Final answer
    x = 359.83

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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.