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Finding the Fourth Proportional to 892.98, 1,229.78 and 873.90

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Solution

The fourth proportional to 892.98, 1,229.78 and 873.90 is: 1,203.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    892.98 : 1,229.78 = 873.90 : x
  2. Step 2: Convert to fraction form
    892.98/1,229.78 = 873.90/x
  3. Step 3: Cross multiply
    892.98x = 1,229.78 × 873.90
  4. Step 4: Simplify right side
    892.98x = 1,074,704.74
  5. Step 5: Solve for x
    x = 1,074,704.74/892.98
  6. Step 6: Final answer
    x = 1,203.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.