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Finding the Fourth Proportional to 43.44, 65.43 and 40.86

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Solution

The fourth proportional to 43.44, 65.43 and 40.86 is: 61.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    43.44 : 65.43 = 40.86 : x
  2. Step 2: Convert to fraction form
    43.44/65.43 = 40.86/x
  3. Step 3: Cross multiply
    43.44x = 65.43 × 40.86
  4. Step 4: Simplify right side
    43.44x = 2,673.47
  5. Step 5: Solve for x
    x = 2,673.47/43.44
  6. Step 6: Final answer
    x = 61.54

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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.