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Finding the Fourth Proportional to 43.76, 60.32 and 31.45

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Solution

The fourth proportional to 43.76, 60.32 and 31.45 is: 43.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    43.76 : 60.32 = 31.45 : x
  2. Step 2: Convert to fraction form
    43.76/60.32 = 31.45/x
  3. Step 3: Cross multiply
    43.76x = 60.32 × 31.45
  4. Step 4: Simplify right side
    43.76x = 1,897.29
  5. Step 5: Solve for x
    x = 1,897.29/43.76
  6. Step 6: Final answer
    x = 43.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.