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Finding the Fourth Proportional to 3,945.98, 5,918.92 and 1,480.74

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Solution

The fourth proportional to 3,945.98, 5,918.92 and 1,480.74 is: 2,221.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,945.98 : 5,918.92 = 1,480.74 : x
  2. Step 2: Convert to fraction form
    3,945.98/5,918.92 = 1,480.74/x
  3. Step 3: Cross multiply
    3,945.98x = 5,918.92 × 1,480.74
  4. Step 4: Simplify right side
    3,945.98x = 8,764,381.60
  5. Step 5: Solve for x
    x = 8,764,381.60/3,945.98
  6. Step 6: Final answer
    x = 2,221.09

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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.