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Finding the Fourth Proportional to 1,806.80, 2,708.34 and 709.66

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Solution

The fourth proportional to 1,806.80, 2,708.34 and 709.66 is: 1,063.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,806.80 : 2,708.34 = 709.66 : x
  2. Step 2: Convert to fraction form
    1,806.80/2,708.34 = 709.66/x
  3. Step 3: Cross multiply
    1,806.80x = 2,708.34 × 709.66
  4. Step 4: Simplify right side
    1,806.80x = 1,922,000.56
  5. Step 5: Solve for x
    x = 1,922,000.56/1,806.80
  6. Step 6: Final answer
    x = 1,063.76

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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.