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Finding the Fourth Proportional to 43.89, 65.60 and 40.11

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Solution

The fourth proportional to 43.89, 65.60 and 40.11 is: 59.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    43.89 : 65.60 = 40.11 : x
  2. Step 2: Convert to fraction form
    43.89/65.60 = 40.11/x
  3. Step 3: Cross multiply
    43.89x = 65.60 × 40.11
  4. Step 4: Simplify right side
    43.89x = 2,631.02
  5. Step 5: Solve for x
    x = 2,631.02/43.89
  6. Step 6: Final answer
    x = 59.95

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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.