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Finding the Fourth Proportional to 961.94, 1,440.90 and 892.76

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Solution

The fourth proportional to 961.94, 1,440.90 and 892.76 is: 1,337.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    961.94 : 1,440.90 = 892.76 : x
  2. Step 2: Convert to fraction form
    961.94/1,440.90 = 892.76/x
  3. Step 3: Cross multiply
    961.94x = 1,440.90 × 892.76
  4. Step 4: Simplify right side
    961.94x = 1,286,377.88
  5. Step 5: Solve for x
    x = 1,286,377.88/961.94
  6. Step 6: Final answer
    x = 1,337.27

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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.