Home / 1,223.21-1,831.36-1,107.87

Finding the Fourth Proportional to 1,223.21, 1,831.36 and 1,107.87

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Solution

The fourth proportional to 1,223.21, 1,831.36 and 1,107.87 is: 1,658.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,223.21 : 1,831.36 = 1,107.87 : x
  2. Step 2: Convert to fraction form
    1,223.21/1,831.36 = 1,107.87/x
  3. Step 3: Cross multiply
    1,223.21x = 1,831.36 × 1,107.87
  4. Step 4: Simplify right side
    1,223.21x = 2,028,908.80
  5. Step 5: Solve for x
    x = 2,028,908.80/1,223.21
  6. Step 6: Final answer
    x = 1,658.68

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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.