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Finding the Fourth Proportional to 892.54, 1,230.98 and 672.18

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Solution

The fourth proportional to 892.54, 1,230.98 and 672.18 is: 927.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    892.54 : 1,230.98 = 672.18 : x
  2. Step 2: Convert to fraction form
    892.54/1,230.98 = 672.18/x
  3. Step 3: Cross multiply
    892.54x = 1,230.98 × 672.18
  4. Step 4: Simplify right side
    892.54x = 827,440.14
  5. Step 5: Solve for x
    x = 827,440.14/892.54
  6. Step 6: Final answer
    x = 927.06

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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.