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Finding the Fourth Proportional to 212.13, 318.50 and 130.73

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Solution

The fourth proportional to 212.13, 318.50 and 130.73 is: 196.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.13 : 318.50 = 130.73 : x
  2. Step 2: Convert to fraction form
    212.13/318.50 = 130.73/x
  3. Step 3: Cross multiply
    212.13x = 318.50 × 130.73
  4. Step 4: Simplify right side
    212.13x = 41,635.26
  5. Step 5: Solve for x
    x = 41,635.26/212.13
  6. Step 6: Final answer
    x = 196.27

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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.