Home / 2,230.57-3,346.31-769.78

Finding the Fourth Proportional to 2,230.57, 3,346.31 and 769.78

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Solution

The fourth proportional to 2,230.57, 3,346.31 and 769.78 is: 1,154.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,230.57 : 3,346.31 = 769.78 : x
  2. Step 2: Convert to fraction form
    2,230.57/3,346.31 = 769.78/x
  3. Step 3: Cross multiply
    2,230.57x = 3,346.31 × 769.78
  4. Step 4: Simplify right side
    2,230.57x = 2,575,922.51
  5. Step 5: Solve for x
    x = 2,575,922.51/2,230.57
  6. Step 6: Final answer
    x = 1,154.83

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1.5x scale

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.