Home / 1,218.26-1,831.44-1,128.08

Finding the Fourth Proportional to 1,218.26, 1,831.44 and 1,128.08

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Solution

The fourth proportional to 1,218.26, 1,831.44 and 1,128.08 is: 1,695.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218.26 : 1,831.44 = 1,128.08 : x
  2. Step 2: Convert to fraction form
    1,218.26/1,831.44 = 1,128.08/x
  3. Step 3: Cross multiply
    1,218.26x = 1,831.44 × 1,128.08
  4. Step 4: Simplify right side
    1,218.26x = 2,066,010.84
  5. Step 5: Solve for x
    x = 2,066,010.84/1,218.26
  6. Step 6: Final answer
    x = 1,695.87

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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.