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Finding the Fourth Proportional to 212.52, 318.24 and 158.28

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Solution

The fourth proportional to 212.52, 318.24 and 158.28 is: 237.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.52 : 318.24 = 158.28 : x
  2. Step 2: Convert to fraction form
    212.52/318.24 = 158.28/x
  3. Step 3: Cross multiply
    212.52x = 318.24 × 158.28
  4. Step 4: Simplify right side
    212.52x = 50,371.03
  5. Step 5: Solve for x
    x = 50,371.03/212.52
  6. Step 6: Final answer
    x = 237.02

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