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Finding the Fourth Proportional to 1,663.80, 2,492.10 and 1,481.40

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Solution

The fourth proportional to 1,663.80, 2,492.10 and 1,481.40 is: 2,218.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,663.80 : 2,492.10 = 1,481.40 : x
  2. Step 2: Convert to fraction form
    1,663.80/2,492.10 = 1,481.40/x
  3. Step 3: Cross multiply
    1,663.80x = 2,492.10 × 1,481.40
  4. Step 4: Simplify right side
    1,663.80x = 3,691,796.94
  5. Step 5: Solve for x
    x = 3,691,796.94/1,663.80
  6. Step 6: Final answer
    x = 2,218.89

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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.