Home / 2,391.56-3,587.12-831.19

Finding the Fourth Proportional to 2,391.56, 3,587.12 and 831.19

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Solution

The fourth proportional to 2,391.56, 3,587.12 and 831.19 is: 1,246.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,391.56 : 3,587.12 = 831.19 : x
  2. Step 2: Convert to fraction form
    2,391.56/3,587.12 = 831.19/x
  3. Step 3: Cross multiply
    2,391.56x = 3,587.12 × 831.19
  4. Step 4: Simplify right side
    2,391.56x = 2,981,556.18
  5. Step 5: Solve for x
    x = 2,981,556.18/2,391.56
  6. Step 6: Final answer
    x = 1,246.70

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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.