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Finding the Fourth Proportional to 44.13, 65.75 and 42.20

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Solution

The fourth proportional to 44.13, 65.75 and 42.20 is: 62.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    44.13 : 65.75 = 42.20 : x
  2. Step 2: Convert to fraction form
    44.13/65.75 = 42.20/x
  3. Step 3: Cross multiply
    44.13x = 65.75 × 42.20
  4. Step 4: Simplify right side
    44.13x = 2,774.65
  5. Step 5: Solve for x
    x = 2,774.65/44.13
  6. Step 6: Final answer
    x = 62.87

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.