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Finding the Fourth Proportional to 43.40, 65.22 and 41.80

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Solution

The fourth proportional to 43.40, 65.22 and 41.80 is: 62.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    43.40 : 65.22 = 41.80 : x
  2. Step 2: Convert to fraction form
    43.40/65.22 = 41.80/x
  3. Step 3: Cross multiply
    43.40x = 65.22 × 41.80
  4. Step 4: Simplify right side
    43.40x = 2,726.20
  5. Step 5: Solve for x
    x = 2,726.20/43.40
  6. Step 6: Final answer
    x = 62.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.