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Finding the Fourth Proportional to 44.78, 67.12 and 31.10

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Solution

The fourth proportional to 44.78, 67.12 and 31.10 is: 46.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    44.78 : 67.12 = 31.10 : x
  2. Step 2: Convert to fraction form
    44.78/67.12 = 31.10/x
  3. Step 3: Cross multiply
    44.78x = 67.12 × 31.10
  4. Step 4: Simplify right side
    44.78x = 2,087.02
  5. Step 5: Solve for x
    x = 2,087.02/44.78
  6. Step 6: Final answer
    x = 46.61

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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.