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Finding the Fourth Proportional to 44.15, 65.79 and 42.70

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Solution

The fourth proportional to 44.15, 65.79 and 42.70 is: 63.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    44.15 : 65.79 = 42.70 : x
  2. Step 2: Convert to fraction form
    44.15/65.79 = 42.70/x
  3. Step 3: Cross multiply
    44.15x = 65.79 × 42.70
  4. Step 4: Simplify right side
    44.15x = 2,808.96
  5. Step 5: Solve for x
    x = 2,808.96/44.15
  6. Step 6: Final answer
    x = 63.63

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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.