Home / 3,887.25-5,831.79-1,290.20

Finding the Fourth Proportional to 3,887.25, 5,831.79 and 1,290.20

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Solution

The fourth proportional to 3,887.25, 5,831.79 and 1,290.20 is: 1,935.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,887.25 : 5,831.79 = 1,290.20 : x
  2. Step 2: Convert to fraction form
    3,887.25/5,831.79 = 1,290.20/x
  3. Step 3: Cross multiply
    3,887.25x = 5,831.79 × 1,290.20
  4. Step 4: Simplify right side
    3,887.25x = 7,524,146.30
  5. Step 5: Solve for x
    x = 7,524,146.30/3,887.25
  6. Step 6: Final answer
    x = 1,935.60

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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.