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Finding the Fourth Proportional to 1,663.90, 2,494.07 and 1,251.81

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Solution

The fourth proportional to 1,663.90, 2,494.07 and 1,251.81 is: 1,876.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,663.90 : 2,494.07 = 1,251.81 : x
  2. Step 2: Convert to fraction form
    1,663.90/2,494.07 = 1,251.81/x
  3. Step 3: Cross multiply
    1,663.90x = 2,494.07 × 1,251.81
  4. Step 4: Simplify right side
    1,663.90x = 3,122,101.77
  5. Step 5: Solve for x
    x = 3,122,101.77/1,663.90
  6. Step 6: Final answer
    x = 1,876.38

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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.