Home / 2,831.67-4,246.13-1,187.78

Finding the Fourth Proportional to 2,831.67, 4,246.13 and 1,187.78

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Solution

The fourth proportional to 2,831.67, 4,246.13 and 1,187.78 is: 1,781.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,831.67 : 4,246.13 = 1,187.78 : x
  2. Step 2: Convert to fraction form
    2,831.67/4,246.13 = 1,187.78/x
  3. Step 3: Cross multiply
    2,831.67x = 4,246.13 × 1,187.78
  4. Step 4: Simplify right side
    2,831.67x = 5,043,441.12
  5. Step 5: Solve for x
    x = 5,043,441.12/2,831.67
  6. Step 6: Final answer
    x = 1,781.08

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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.