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Finding the Fourth Proportional to 5,200, 7,174.92 and 3,521.68

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Solution

The fourth proportional to 5,200, 7,174.92 and 3,521.68 is: 4,859.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,200 : 7,174.92 = 3,521.68 : x
  2. Step 2: Convert to fraction form
    5,200/7,174.92 = 3,521.68/x
  3. Step 3: Cross multiply
    5,200x = 7,174.92 × 3,521.68
  4. Step 4: Simplify right side
    5,200x = 25,267,772.27
  5. Step 5: Solve for x
    x = 25,267,772.27/5,200
  6. Step 6: Final answer
    x = 4,859.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.