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Finding the Fourth Proportional to 40.90, 60.98 and 40.22

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Solution

The fourth proportional to 40.90, 60.98 and 40.22 is: 59.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    40.90 : 60.98 = 40.22 : x
  2. Step 2: Convert to fraction form
    40.90/60.98 = 40.22/x
  3. Step 3: Cross multiply
    40.90x = 60.98 × 40.22
  4. Step 4: Simplify right side
    40.90x = 2,452.62
  5. Step 5: Solve for x
    x = 2,452.62/40.90
  6. Step 6: Final answer
    x = 59.97

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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.