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Finding the Fourth Proportional to 43.24, 65.12 and 40.48

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Solution

The fourth proportional to 43.24, 65.12 and 40.48 is: 60.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    43.24 : 65.12 = 40.48 : x
  2. Step 2: Convert to fraction form
    43.24/65.12 = 40.48/x
  3. Step 3: Cross multiply
    43.24x = 65.12 × 40.48
  4. Step 4: Simplify right side
    43.24x = 2,636.06
  5. Step 5: Solve for x
    x = 2,636.06/43.24
  6. Step 6: Final answer
    x = 60.96

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.