Home / 2,391.44-3,587.73-831.21

Finding the Fourth Proportional to 2,391.44, 3,587.73 and 831.21

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Solution

The fourth proportional to 2,391.44, 3,587.73 and 831.21 is: 1,247.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,391.44 : 3,587.73 = 831.21 : x
  2. Step 2: Convert to fraction form
    2,391.44/3,587.73 = 831.21/x
  3. Step 3: Cross multiply
    2,391.44x = 3,587.73 × 831.21
  4. Step 4: Simplify right side
    2,391.44x = 2,982,157.05
  5. Step 5: Solve for x
    x = 2,982,157.05/2,391.44
  6. Step 6: Final answer
    x = 1,247.02

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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.