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Finding the Fourth Proportional to 916.67, 1,375.09 and 267.41

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Solution

The fourth proportional to 916.67, 1,375.09 and 267.41 is: 401.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    916.67 : 1,375.09 = 267.41 : x
  2. Step 2: Convert to fraction form
    916.67/1,375.09 = 267.41/x
  3. Step 3: Cross multiply
    916.67x = 1,375.09 × 267.41
  4. Step 4: Simplify right side
    916.67x = 367,712.82
  5. Step 5: Solve for x
    x = 367,712.82/916.67
  6. Step 6: Final answer
    x = 401.14

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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.