Home / 1,220.88-1,831.54-490.51

Finding the Fourth Proportional to 1,220.88, 1,831.54 and 490.51

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Solution

The fourth proportional to 1,220.88, 1,831.54 and 490.51 is: 735.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,220.88 : 1,831.54 = 490.51 : x
  2. Step 2: Convert to fraction form
    1,220.88/1,831.54 = 490.51/x
  3. Step 3: Cross multiply
    1,220.88x = 1,831.54 × 490.51
  4. Step 4: Simplify right side
    1,220.88x = 898,385.33
  5. Step 5: Solve for x
    x = 898,385.33/1,220.88
  6. Step 6: Final answer
    x = 735.85

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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.