Home / 2,831.78-4,269.38-2,641.20

Finding the Fourth Proportional to 2,831.78, 4,269.38 and 2,641.20

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Solution

The fourth proportional to 2,831.78, 4,269.38 and 2,641.20 is: 3,982.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,831.78 : 4,269.38 = 2,641.20 : x
  2. Step 2: Convert to fraction form
    2,831.78/4,269.38 = 2,641.20/x
  3. Step 3: Cross multiply
    2,831.78x = 4,269.38 × 2,641.20
  4. Step 4: Simplify right side
    2,831.78x = 11,276,273.25
  5. Step 5: Solve for x
    x = 11,276,273.25/2,831.78
  6. Step 6: Final answer
    x = 3,982.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.