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Finding the Fourth Proportional to 40.45, 60.32 and 36.61

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Solution

The fourth proportional to 40.45, 60.32 and 36.61 is: 54.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    40.45 : 60.32 = 36.61 : x
  2. Step 2: Convert to fraction form
    40.45/60.32 = 36.61/x
  3. Step 3: Cross multiply
    40.45x = 60.32 × 36.61
  4. Step 4: Simplify right side
    40.45x = 2,208.32
  5. Step 5: Solve for x
    x = 2,208.32/40.45
  6. Step 6: Final answer
    x = 54.59

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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.