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Finding the Fourth Proportional to 43.96, 66.32 and 43

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Solution

The fourth proportional to 43.96, 66.32 and 43 is: 64.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    43.96 : 66.32 = 43 : x
  2. Step 2: Convert to fraction form
    43.96/66.32 = 43/x
  3. Step 3: Cross multiply
    43.96x = 66.32 × 43
  4. Step 4: Simplify right side
    43.96x = 2,851.76
  5. Step 5: Solve for x
    x = 2,851.76/43.96
  6. Step 6: Final answer
    x = 64.87

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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.