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Finding the Fourth Proportional to 212.70, 319.23 and 158.52

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Solution

The fourth proportional to 212.70, 319.23 and 158.52 is: 237.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.70 : 319.23 = 158.52 : x
  2. Step 2: Convert to fraction form
    212.70/319.23 = 158.52/x
  3. Step 3: Cross multiply
    212.70x = 319.23 × 158.52
  4. Step 4: Simplify right side
    212.70x = 50,604.34
  5. Step 5: Solve for x
    x = 50,604.34/212.70
  6. Step 6: Final answer
    x = 237.91

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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.