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Finding the Fourth Proportional to 5,721.28, 7,894.39 and 3,363.87

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Solution

The fourth proportional to 5,721.28, 7,894.39 and 3,363.87 is: 4,641.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,721.28 : 7,894.39 = 3,363.87 : x
  2. Step 2: Convert to fraction form
    5,721.28/7,894.39 = 3,363.87/x
  3. Step 3: Cross multiply
    5,721.28x = 7,894.39 × 3,363.87
  4. Step 4: Simplify right side
    5,721.28x = 26,555,701.69
  5. Step 5: Solve for x
    x = 26,555,701.69/5,721.28
  6. Step 6: Final answer
    x = 4,641.57

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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.