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Finding the Fourth Proportional to 5,329.62, 7,991.02 and 2,211.78

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Solution

The fourth proportional to 5,329.62, 7,991.02 and 2,211.78 is: 3,316.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,329.62 : 7,991.02 = 2,211.78 : x
  2. Step 2: Convert to fraction form
    5,329.62/7,991.02 = 2,211.78/x
  3. Step 3: Cross multiply
    5,329.62x = 7,991.02 × 2,211.78
  4. Step 4: Simplify right side
    5,329.62x = 17,674,382.25
  5. Step 5: Solve for x
    x = 17,674,382.25/5,329.62
  6. Step 6: Final answer
    x = 3,316.25

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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.