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Finding the Fourth Proportional to 1,806.62, 2,709.01 and 831.88

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Solution

The fourth proportional to 1,806.62, 2,709.01 and 831.88 is: 1,247.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,806.62 : 2,709.01 = 831.88 : x
  2. Step 2: Convert to fraction form
    1,806.62/2,709.01 = 831.88/x
  3. Step 3: Cross multiply
    1,806.62x = 2,709.01 × 831.88
  4. Step 4: Simplify right side
    1,806.62x = 2,253,553.53
  5. Step 5: Solve for x
    x = 2,253,553.53/1,806.62
  6. Step 6: Final answer
    x = 1,247.39

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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.