Home / 1,220.98-1,831.49-399.25

Finding the Fourth Proportional to 1,220.98, 1,831.49 and 399.25

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Solution

The fourth proportional to 1,220.98, 1,831.49 and 399.25 is: 598.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,220.98 : 1,831.49 = 399.25 : x
  2. Step 2: Convert to fraction form
    1,220.98/1,831.49 = 399.25/x
  3. Step 3: Cross multiply
    1,220.98x = 1,831.49 × 399.25
  4. Step 4: Simplify right side
    1,220.98x = 731,222.38
  5. Step 5: Solve for x
    x = 731,222.38/1,220.98
  6. Step 6: Final answer
    x = 598.88

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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.