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Finding the Fourth Proportional to 44.40, 61.44 and 42.72

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Solution

The fourth proportional to 44.40, 61.44 and 42.72 is: 59.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    44.40 : 61.44 = 42.72 : x
  2. Step 2: Convert to fraction form
    44.40/61.44 = 42.72/x
  3. Step 3: Cross multiply
    44.40x = 61.44 × 42.72
  4. Step 4: Simplify right side
    44.40x = 2,624.72
  5. Step 5: Solve for x
    x = 2,624.72/44.40
  6. Step 6: Final answer
    x = 59.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.