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Finding the Fourth Proportional to 1,660.10, 2,489.07 and 794.90

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Solution

The fourth proportional to 1,660.10, 2,489.07 and 794.90 is: 1,191.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,660.10 : 2,489.07 = 794.90 : x
  2. Step 2: Convert to fraction form
    1,660.10/2,489.07 = 794.90/x
  3. Step 3: Cross multiply
    1,660.10x = 2,489.07 × 794.90
  4. Step 4: Simplify right side
    1,660.10x = 1,978,561.74
  5. Step 5: Solve for x
    x = 1,978,561.74/1,660.10
  6. Step 6: Final answer
    x = 1,191.83

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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.