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Finding the Fourth Proportional to 892.48, 1,230.46 and 612.20

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Solution

The fourth proportional to 892.48, 1,230.46 and 612.20 is: 844.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    892.48 : 1,230.46 = 612.20 : x
  2. Step 2: Convert to fraction form
    892.48/1,230.46 = 612.20/x
  3. Step 3: Cross multiply
    892.48x = 1,230.46 × 612.20
  4. Step 4: Simplify right side
    892.48x = 753,287.61
  5. Step 5: Solve for x
    x = 753,287.61/892.48
  6. Step 6: Final answer
    x = 844.04

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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.