Home / 2,391.18-3,587.30-831.12

Finding the Fourth Proportional to 2,391.18, 3,587.30 and 831.12

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Solution

The fourth proportional to 2,391.18, 3,587.30 and 831.12 is: 1,246.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,391.18 : 3,587.30 = 831.12 : x
  2. Step 2: Convert to fraction form
    2,391.18/3,587.30 = 831.12/x
  3. Step 3: Cross multiply
    2,391.18x = 3,587.30 × 831.12
  4. Step 4: Simplify right side
    2,391.18x = 2,981,476.78
  5. Step 5: Solve for x
    x = 2,981,476.78/2,391.18
  6. Step 6: Final answer
    x = 1,246.86

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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.