Home / 2,769.50-4,155.42-1,309.70

Finding the Fourth Proportional to 2,769.50, 4,155.42 and 1,309.70

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Solution

The fourth proportional to 2,769.50, 4,155.42 and 1,309.70 is: 1,965.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,769.50 : 4,155.42 = 1,309.70 : x
  2. Step 2: Convert to fraction form
    2,769.50/4,155.42 = 1,309.70/x
  3. Step 3: Cross multiply
    2,769.50x = 4,155.42 × 1,309.70
  4. Step 4: Simplify right side
    2,769.50x = 5,442,353.57
  5. Step 5: Solve for x
    x = 5,442,353.57/2,769.50
  6. Step 6: Final answer
    x = 1,965.10

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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.