Home / 1,221.24-1,831.36-441.08

Finding the Fourth Proportional to 1,221.24, 1,831.36 and 441.08

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Solution

The fourth proportional to 1,221.24, 1,831.36 and 441.08 is: 661.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221.24 : 1,831.36 = 441.08 : x
  2. Step 2: Convert to fraction form
    1,221.24/1,831.36 = 441.08/x
  3. Step 3: Cross multiply
    1,221.24x = 1,831.36 × 441.08
  4. Step 4: Simplify right side
    1,221.24x = 807,776.27
  5. Step 5: Solve for x
    x = 807,776.27/1,221.24
  6. Step 6: Final answer
    x = 661.44

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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.