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Finding the Fourth Proportional to 5,739.26, 7,920.25 and 3,221.91

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Solution

The fourth proportional to 5,739.26, 7,920.25 and 3,221.91 is: 4,446.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,739.26 : 7,920.25 = 3,221.91 : x
  2. Step 2: Convert to fraction form
    5,739.26/7,920.25 = 3,221.91/x
  3. Step 3: Cross multiply
    5,739.26x = 7,920.25 × 3,221.91
  4. Step 4: Simplify right side
    5,739.26x = 25,518,324.62
  5. Step 5: Solve for x
    x = 25,518,324.62/5,739.26
  6. Step 6: Final answer
    x = 4,446.28

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1.5x scale

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.