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Finding the Fourth Proportional to 44.94, 67.42 and 39.90

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Solution

The fourth proportional to 44.94, 67.42 and 39.90 is: 59.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    44.94 : 67.42 = 39.90 : x
  2. Step 2: Convert to fraction form
    44.94/67.42 = 39.90/x
  3. Step 3: Cross multiply
    44.94x = 67.42 × 39.90
  4. Step 4: Simplify right side
    44.94x = 2,690.06
  5. Step 5: Solve for x
    x = 2,690.06/44.94
  6. Step 6: Final answer
    x = 59.86

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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.