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Finding the Fourth Proportional to 3,945.79, 5,918.46 and 1,480.41

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Solution

The fourth proportional to 3,945.79, 5,918.46 and 1,480.41 is: 2,220.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,945.79 : 5,918.46 = 1,480.41 : x
  2. Step 2: Convert to fraction form
    3,945.79/5,918.46 = 1,480.41/x
  3. Step 3: Cross multiply
    3,945.79x = 5,918.46 × 1,480.41
  4. Step 4: Simplify right side
    3,945.79x = 8,761,747.37
  5. Step 5: Solve for x
    x = 8,761,747.37/3,945.79
  6. Step 6: Final answer
    x = 2,220.53

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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.