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Finding the Fourth Proportional to 1,743.20, 2,615.00 and 769.17

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Solution

The fourth proportional to 1,743.20, 2,615.00 and 769.17 is: 1,153.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,743.20 : 2,615.00 = 769.17 : x
  2. Step 2: Convert to fraction form
    1,743.20/2,615.00 = 769.17/x
  3. Step 3: Cross multiply
    1,743.20x = 2,615.00 × 769.17
  4. Step 4: Simplify right side
    1,743.20x = 2,011,375.70
  5. Step 5: Solve for x
    x = 2,011,375.70/1,743.20
  6. Step 6: Final answer
    x = 1,153.84

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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.