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Finding the Fourth Proportional to 2,474.20, 3,711.31 and 830.79

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Solution

The fourth proportional to 2,474.20, 3,711.31 and 830.79 is: 1,246.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,474.20 : 3,711.31 = 830.79 : x
  2. Step 2: Convert to fraction form
    2,474.20/3,711.31 = 830.79/x
  3. Step 3: Cross multiply
    2,474.20x = 3,711.31 × 830.79
  4. Step 4: Simplify right side
    2,474.20x = 3,083,315.08
  5. Step 5: Solve for x
    x = 3,083,315.08/2,474.20
  6. Step 6: Final answer
    x = 1,246.19

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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.