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Finding the Fourth Proportional to 42.09, 62.80 and 41.55

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Solution

The fourth proportional to 42.09, 62.80 and 41.55 is: 61.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    42.09 : 62.80 = 41.55 : x
  2. Step 2: Convert to fraction form
    42.09/62.80 = 41.55/x
  3. Step 3: Cross multiply
    42.09x = 62.80 × 41.55
  4. Step 4: Simplify right side
    42.09x = 2,609.34
  5. Step 5: Solve for x
    x = 2,609.34/42.09
  6. Step 6: Final answer
    x = 61.99

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