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Finding the Fourth Proportional to 266.11, 399.20 and 101.68

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Solution

The fourth proportional to 266.11, 399.20 and 101.68 is: 152.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.11 : 399.20 = 101.68 : x
  2. Step 2: Convert to fraction form
    266.11/399.20 = 101.68/x
  3. Step 3: Cross multiply
    266.11x = 399.20 × 101.68
  4. Step 4: Simplify right side
    266.11x = 40,589.15
  5. Step 5: Solve for x
    x = 40,589.15/266.11
  6. Step 6: Final answer
    x = 152.53

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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.