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Finding the Fourth Proportional to 212.22, 318.48 and 158.13

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Solution

The fourth proportional to 212.22, 318.48 and 158.13 is: 237.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.22 : 318.48 = 158.13 : x
  2. Step 2: Convert to fraction form
    212.22/318.48 = 158.13/x
  3. Step 3: Cross multiply
    212.22x = 318.48 × 158.13
  4. Step 4: Simplify right side
    212.22x = 50,361.24
  5. Step 5: Solve for x
    x = 50,361.24/212.22
  6. Step 6: Final answer
    x = 237.31

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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.