Home / 2,769.90-4,157.28-1,538.70

Finding the Fourth Proportional to 2,769.90, 4,157.28 and 1,538.70

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Solution

The fourth proportional to 2,769.90, 4,157.28 and 1,538.70 is: 2,309.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,769.90 : 4,157.28 = 1,538.70 : x
  2. Step 2: Convert to fraction form
    2,769.90/4,157.28 = 1,538.70/x
  3. Step 3: Cross multiply
    2,769.90x = 4,157.28 × 1,538.70
  4. Step 4: Simplify right side
    2,769.90x = 6,396,806.74
  5. Step 5: Solve for x
    x = 6,396,806.74/2,769.90
  6. Step 6: Final answer
    x = 2,309.40

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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.