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Finding the Fourth Proportional to 318.61, 477.72 and 110.31

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Solution

The fourth proportional to 318.61, 477.72 and 110.31 is: 165.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.61 : 477.72 = 110.31 : x
  2. Step 2: Convert to fraction form
    318.61/477.72 = 110.31/x
  3. Step 3: Cross multiply
    318.61x = 477.72 × 110.31
  4. Step 4: Simplify right side
    318.61x = 52,696.21
  5. Step 5: Solve for x
    x = 52,696.21/318.61
  6. Step 6: Final answer
    x = 165.39

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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.