Home / 1,220.84-1,831.25-355.22

Finding the Fourth Proportional to 1,220.84, 1,831.25 and 355.22

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Solution

The fourth proportional to 1,220.84, 1,831.25 and 355.22 is: 532.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,220.84 : 1,831.25 = 355.22 : x
  2. Step 2: Convert to fraction form
    1,220.84/1,831.25 = 355.22/x
  3. Step 3: Cross multiply
    1,220.84x = 1,831.25 × 355.22
  4. Step 4: Simplify right side
    1,220.84x = 650,488.36
  5. Step 5: Solve for x
    x = 650,488.36/1,220.84
  6. Step 6: Final answer
    x = 532.82

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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.