Home / 1,220.97-1,831.68-399.29

Finding the Fourth Proportional to 1,220.97, 1,831.68 and 399.29

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Solution

The fourth proportional to 1,220.97, 1,831.68 and 399.29 is: 599.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,220.97 : 1,831.68 = 399.29 : x
  2. Step 2: Convert to fraction form
    1,220.97/1,831.68 = 399.29/x
  3. Step 3: Cross multiply
    1,220.97x = 1,831.68 × 399.29
  4. Step 4: Simplify right side
    1,220.97x = 731,369.22
  5. Step 5: Solve for x
    x = 731,369.22/1,220.97
  6. Step 6: Final answer
    x = 599.01

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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.