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Finding the Fourth Proportional to 158.18, 238.44 and 131.30

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Solution

The fourth proportional to 158.18, 238.44 and 131.30 is: 197.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.18 : 238.44 = 131.30 : x
  2. Step 2: Convert to fraction form
    158.18/238.44 = 131.30/x
  3. Step 3: Cross multiply
    158.18x = 238.44 × 131.30
  4. Step 4: Simplify right side
    158.18x = 31,306.87
  5. Step 5: Solve for x
    x = 31,306.87/158.18
  6. Step 6: Final answer
    x = 197.92

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.