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Finding the Fourth Proportional to 42.21, 62.79 and 41.04

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Solution

The fourth proportional to 42.21, 62.79 and 41.04 is: 61.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    42.21 : 62.79 = 41.04 : x
  2. Step 2: Convert to fraction form
    42.21/62.79 = 41.04/x
  3. Step 3: Cross multiply
    42.21x = 62.79 × 41.04
  4. Step 4: Simplify right side
    42.21x = 2,577.19
  5. Step 5: Solve for x
    x = 2,577.19/42.21
  6. Step 6: Final answer
    x = 61.05

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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.