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Finding the Fourth Proportional to 267.75, 400.87 and 207.00

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Solution

The fourth proportional to 267.75, 400.87 and 207.00 is: 309.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    267.75 : 400.87 = 207.00 : x
  2. Step 2: Convert to fraction form
    267.75/400.87 = 207.00/x
  3. Step 3: Cross multiply
    267.75x = 400.87 × 207.00
  4. Step 4: Simplify right side
    267.75x = 82,981.85
  5. Step 5: Solve for x
    x = 82,981.85/267.75
  6. Step 6: Final answer
    x = 309.92

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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.