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Finding the Fourth Proportional to 266.01, 399.07 and 111.85

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Solution

The fourth proportional to 266.01, 399.07 and 111.85 is: 167.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.01 : 399.07 = 111.85 : x
  2. Step 2: Convert to fraction form
    266.01/399.07 = 111.85/x
  3. Step 3: Cross multiply
    266.01x = 399.07 × 111.85
  4. Step 4: Simplify right side
    266.01x = 44,635.98
  5. Step 5: Solve for x
    x = 44,635.98/266.01
  6. Step 6: Final answer
    x = 167.80

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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.