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Finding the Fourth Proportional to 266.83, 400.19 and 74.41

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Solution

The fourth proportional to 266.83, 400.19 and 74.41 is: 111.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.83 : 400.19 = 74.41 : x
  2. Step 2: Convert to fraction form
    266.83/400.19 = 74.41/x
  3. Step 3: Cross multiply
    266.83x = 400.19 × 74.41
  4. Step 4: Simplify right side
    266.83x = 29,778.14
  5. Step 5: Solve for x
    x = 29,778.14/266.83
  6. Step 6: Final answer
    x = 111.60

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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.