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Finding the Fourth Proportional to 2,753.50, 4,129.78 and 998.18

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Solution

The fourth proportional to 2,753.50, 4,129.78 and 998.18 is: 1,497.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,753.50 : 4,129.78 = 998.18 : x
  2. Step 2: Convert to fraction form
    2,753.50/4,129.78 = 998.18/x
  3. Step 3: Cross multiply
    2,753.50x = 4,129.78 × 998.18
  4. Step 4: Simplify right side
    2,753.50x = 4,122,263.80
  5. Step 5: Solve for x
    x = 4,122,263.80/2,753.50
  6. Step 6: Final answer
    x = 1,497.10

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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.