Home / 3,887.80-5,831.70-1,255.30

Finding the Fourth Proportional to 3,887.80, 5,831.70 and 1,255.30

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Solution

The fourth proportional to 3,887.80, 5,831.70 and 1,255.30 is: 1,882.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,887.80 : 5,831.70 = 1,255.30 : x
  2. Step 2: Convert to fraction form
    3,887.80/5,831.70 = 1,255.30/x
  3. Step 3: Cross multiply
    3,887.80x = 5,831.70 × 1,255.30
  4. Step 4: Simplify right side
    3,887.80x = 7,320,533.01
  5. Step 5: Solve for x
    x = 7,320,533.01/3,887.80
  6. Step 6: Final answer
    x = 1,882.95

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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.