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Finding the Fourth Proportional to 3,478, 5,217 and 1,169.68

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Solution

The fourth proportional to 3,478, 5,217 and 1,169.68 is: 1,754.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,478 : 5,217 = 1,169.68 : x
  2. Step 2: Convert to fraction form
    3,478/5,217 = 1,169.68/x
  3. Step 3: Cross multiply
    3,478x = 5,217 × 1,169.68
  4. Step 4: Simplify right side
    3,478x = 6,102,220.56
  5. Step 5: Solve for x
    x = 6,102,220.56/3,478
  6. Step 6: Final answer
    x = 1,754.52

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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.