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Finding the Fourth Proportional to 994.50, 1,373.22 and 862.20

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Solution

The fourth proportional to 994.50, 1,373.22 and 862.20 is: 1,190.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    994.50 : 1,373.22 = 862.20 : x
  2. Step 2: Convert to fraction form
    994.50/1,373.22 = 862.20/x
  3. Step 3: Cross multiply
    994.50x = 1,373.22 × 862.20
  4. Step 4: Simplify right side
    994.50x = 1,183,990.28
  5. Step 5: Solve for x
    x = 1,183,990.28/994.50
  6. Step 6: Final answer
    x = 1,190.54

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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.