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Finding the Fourth Proportional to 318.04, 477.10 and 112.72

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Solution

The fourth proportional to 318.04, 477.10 and 112.72 is: 169.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.04 : 477.10 = 112.72 : x
  2. Step 2: Convert to fraction form
    318.04/477.10 = 112.72/x
  3. Step 3: Cross multiply
    318.04x = 477.10 × 112.72
  4. Step 4: Simplify right side
    318.04x = 53,778.71
  5. Step 5: Solve for x
    x = 53,778.71/318.04
  6. Step 6: Final answer
    x = 169.09

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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.