Home / 2,156.39-3,233.56-769.70

Finding the Fourth Proportional to 2,156.39, 3,233.56 and 769.70

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Solution

The fourth proportional to 2,156.39, 3,233.56 and 769.70 is: 1,154.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,156.39 : 3,233.56 = 769.70 : x
  2. Step 2: Convert to fraction form
    2,156.39/3,233.56 = 769.70/x
  3. Step 3: Cross multiply
    2,156.39x = 3,233.56 × 769.70
  4. Step 4: Simplify right side
    2,156.39x = 2,488,871.13
  5. Step 5: Solve for x
    x = 2,488,871.13/2,156.39
  6. Step 6: Final answer
    x = 1,154.18

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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.