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Finding the Fourth Proportional to 44.90, 67.30 and 39.18

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Solution

The fourth proportional to 44.90, 67.30 and 39.18 is: 58.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    44.90 : 67.30 = 39.18 : x
  2. Step 2: Convert to fraction form
    44.90/67.30 = 39.18/x
  3. Step 3: Cross multiply
    44.90x = 67.30 × 39.18
  4. Step 4: Simplify right side
    44.90x = 2,636.97
  5. Step 5: Solve for x
    x = 2,636.97/44.90
  6. Step 6: Final answer
    x = 58.72

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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.