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Finding the Fourth Proportional to 318.14, 477.28 and 112.74

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Solution

The fourth proportional to 318.14, 477.28 and 112.74 is: 169.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.14 : 477.28 = 112.74 : x
  2. Step 2: Convert to fraction form
    318.14/477.28 = 112.74/x
  3. Step 3: Cross multiply
    318.14x = 477.28 × 112.74
  4. Step 4: Simplify right side
    318.14x = 53,808.95
  5. Step 5: Solve for x
    x = 53,808.95/318.14
  6. Step 6: Final answer
    x = 169.13

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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.