Home / 2,489.31-3,435.22-1,412.78

Finding the Fourth Proportional to 2,489.31, 3,435.22 and 1,412.78

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Solution

The fourth proportional to 2,489.31, 3,435.22 and 1,412.78 is: 1,949.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,489.31 : 3,435.22 = 1,412.78 : x
  2. Step 2: Convert to fraction form
    2,489.31/3,435.22 = 1,412.78/x
  3. Step 3: Cross multiply
    2,489.31x = 3,435.22 × 1,412.78
  4. Step 4: Simplify right side
    2,489.31x = 4,853,227.48
  5. Step 5: Solve for x
    x = 4,853,227.48/2,489.31
  6. Step 6: Final answer
    x = 1,949.63

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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.