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Finding the Fourth Proportional to 40.02, 59.86 and 31.44

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Solution

The fourth proportional to 40.02, 59.86 and 31.44 is: 47.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    40.02 : 59.86 = 31.44 : x
  2. Step 2: Convert to fraction form
    40.02/59.86 = 31.44/x
  3. Step 3: Cross multiply
    40.02x = 59.86 × 31.44
  4. Step 4: Simplify right side
    40.02x = 1,882.01
  5. Step 5: Solve for x
    x = 1,882.01/40.02
  6. Step 6: Final answer
    x = 47.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.