Home / 2,831.60-4,247.52-1,187

Finding the Fourth Proportional to 2,831.60, 4,247.52 and 1,187

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Solution

The fourth proportional to 2,831.60, 4,247.52 and 1,187 is: 1,780.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,831.60 : 4,247.52 = 1,187 : x
  2. Step 2: Convert to fraction form
    2,831.60/4,247.52 = 1,187/x
  3. Step 3: Cross multiply
    2,831.60x = 4,247.52 × 1,187
  4. Step 4: Simplify right side
    2,831.60x = 5,041,806.24
  5. Step 5: Solve for x
    x = 5,041,806.24/2,831.60
  6. Step 6: Final answer
    x = 1,780.55

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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.