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Finding the Fourth Proportional to 3,480.65, 5,221.80 and 1,015.49

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Solution

The fourth proportional to 3,480.65, 5,221.80 and 1,015.49 is: 1,523.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,480.65 : 5,221.80 = 1,015.49 : x
  2. Step 2: Convert to fraction form
    3,480.65/5,221.80 = 1,015.49/x
  3. Step 3: Cross multiply
    3,480.65x = 5,221.80 × 1,015.49
  4. Step 4: Simplify right side
    3,480.65x = 5,302,659.57
  5. Step 5: Solve for x
    x = 5,302,659.57/3,480.65
  6. Step 6: Final answer
    x = 1,523.47

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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.