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Finding the Fourth Proportional to 267.98, 400.94 and 209.77

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Solution

The fourth proportional to 267.98, 400.94 and 209.77 is: 313.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    267.98 : 400.94 = 209.77 : x
  2. Step 2: Convert to fraction form
    267.98/400.94 = 209.77/x
  3. Step 3: Cross multiply
    267.98x = 400.94 × 209.77
  4. Step 4: Simplify right side
    267.98x = 84,105.18
  5. Step 5: Solve for x
    x = 84,105.18/267.98
  6. Step 6: Final answer
    x = 313.85

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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.