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Finding the Fourth Proportional to 2,663.18, 3,994.78 and 814.26

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Solution

The fourth proportional to 2,663.18, 3,994.78 and 814.26 is: 1,221.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,663.18 : 3,994.78 = 814.26 : x
  2. Step 2: Convert to fraction form
    2,663.18/3,994.78 = 814.26/x
  3. Step 3: Cross multiply
    2,663.18x = 3,994.78 × 814.26
  4. Step 4: Simplify right side
    2,663.18x = 3,252,789.56
  5. Step 5: Solve for x
    x = 3,252,789.56/2,663.18
  6. Step 6: Final answer
    x = 1,221.39

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1.5x scale

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.