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Finding the Fourth Proportional to 43.65, 60.20 and 31.37

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Solution

The fourth proportional to 43.65, 60.20 and 31.37 is: 43.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    43.65 : 60.20 = 31.37 : x
  2. Step 2: Convert to fraction form
    43.65/60.20 = 31.37/x
  3. Step 3: Cross multiply
    43.65x = 60.20 × 31.37
  4. Step 4: Simplify right side
    43.65x = 1,888.02
  5. Step 5: Solve for x
    x = 1,888.02/43.65
  6. Step 6: Final answer
    x = 43.25

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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.