Home / 1,540.40-2,125.38-868.06

Finding the Fourth Proportional to 1,540.40, 2,125.38 and 868.06

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Solution

The fourth proportional to 1,540.40, 2,125.38 and 868.06 is: 1,197.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,540.40 : 2,125.38 = 868.06 : x
  2. Step 2: Convert to fraction form
    1,540.40/2,125.38 = 868.06/x
  3. Step 3: Cross multiply
    1,540.40x = 2,125.38 × 868.06
  4. Step 4: Simplify right side
    1,540.40x = 1,844,957.36
  5. Step 5: Solve for x
    x = 1,844,957.36/1,540.40
  6. Step 6: Final answer
    x = 1,197.71

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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.