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Finding the Fourth Proportional to 2,708.80, 4,063.20 and 760.96

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Solution

The fourth proportional to 2,708.80, 4,063.20 and 760.96 is: 1,141.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,708.80 : 4,063.20 = 760.96 : x
  2. Step 2: Convert to fraction form
    2,708.80/4,063.20 = 760.96/x
  3. Step 3: Cross multiply
    2,708.80x = 4,063.20 × 760.96
  4. Step 4: Simplify right side
    2,708.80x = 3,091,932.67
  5. Step 5: Solve for x
    x = 3,091,932.67/2,708.80
  6. Step 6: Final answer
    x = 1,141.44

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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.