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Finding the Fourth Proportional to 844.72, 1,267.20 and 267.64

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Solution

The fourth proportional to 844.72, 1,267.20 and 267.64 is: 401.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    844.72 : 1,267.20 = 267.64 : x
  2. Step 2: Convert to fraction form
    844.72/1,267.20 = 267.64/x
  3. Step 3: Cross multiply
    844.72x = 1,267.20 × 267.64
  4. Step 4: Simplify right side
    844.72x = 339,153.41
  5. Step 5: Solve for x
    x = 339,153.41/844.72
  6. Step 6: Final answer
    x = 401.50

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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.