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Finding the Fourth Proportional to 3,887.81, 5,831.61 and 1,255.31

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Solution

The fourth proportional to 3,887.81, 5,831.61 and 1,255.31 is: 1,882.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,887.81 : 5,831.61 = 1,255.31 : x
  2. Step 2: Convert to fraction form
    3,887.81/5,831.61 = 1,255.31/x
  3. Step 3: Cross multiply
    3,887.81x = 5,831.61 × 1,255.31
  4. Step 4: Simplify right side
    3,887.81x = 7,320,478.35
  5. Step 5: Solve for x
    x = 7,320,478.35/3,887.81
  6. Step 6: Final answer
    x = 1,882.93

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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.