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Finding the Fourth Proportional to 42.01, 58.00 and 31.67

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Solution

The fourth proportional to 42.01, 58.00 and 31.67 is: 43.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    42.01 : 58.00 = 31.67 : x
  2. Step 2: Convert to fraction form
    42.01/58.00 = 31.67/x
  3. Step 3: Cross multiply
    42.01x = 58.00 × 31.67
  4. Step 4: Simplify right side
    42.01x = 1,836.49
  5. Step 5: Solve for x
    x = 1,836.49/42.01
  6. Step 6: Final answer
    x = 43.72

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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.