Home / 1,805.38-2,489.94-1,276.05

Finding the Fourth Proportional to 1,805.38, 2,489.94 and 1,276.05

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Solution

The fourth proportional to 1,805.38, 2,489.94 and 1,276.05 is: 1,759.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,805.38 : 2,489.94 = 1,276.05 : x
  2. Step 2: Convert to fraction form
    1,805.38/2,489.94 = 1,276.05/x
  3. Step 3: Cross multiply
    1,805.38x = 2,489.94 × 1,276.05
  4. Step 4: Simplify right side
    1,805.38x = 3,177,275.49
  5. Step 5: Solve for x
    x = 3,177,275.49/1,805.38
  6. Step 6: Final answer
    x = 1,759.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.