Home / 1,948.36-2,689.70-1,240.90

Finding the Fourth Proportional to 1,948.36, 2,689.70 and 1,240.90

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Solution

The fourth proportional to 1,948.36, 2,689.70 and 1,240.90 is: 1,713.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,948.36 : 2,689.70 = 1,240.90 : x
  2. Step 2: Convert to fraction form
    1,948.36/2,689.70 = 1,240.90/x
  3. Step 3: Cross multiply
    1,948.36x = 2,689.70 × 1,240.90
  4. Step 4: Simplify right side
    1,948.36x = 3,337,648.73
  5. Step 5: Solve for x
    x = 3,337,648.73/1,948.36
  6. Step 6: Final answer
    x = 1,713.06

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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.