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Finding the Fourth Proportional to 268.77, 400.20 and 267.96

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Solution

The fourth proportional to 268.77, 400.20 and 267.96 is: 398.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.77 : 400.20 = 267.96 : x
  2. Step 2: Convert to fraction form
    268.77/400.20 = 267.96/x
  3. Step 3: Cross multiply
    268.77x = 400.20 × 267.96
  4. Step 4: Simplify right side
    268.77x = 107,237.59
  5. Step 5: Solve for x
    x = 107,237.59/268.77
  6. Step 6: Final answer
    x = 398.99

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.