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Finding the Fourth Proportional to 2,132.87, 3,199.50 and 816.62

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Solution

The fourth proportional to 2,132.87, 3,199.50 and 816.62 is: 1,225.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,132.87 : 3,199.50 = 816.62 : x
  2. Step 2: Convert to fraction form
    2,132.87/3,199.50 = 816.62/x
  3. Step 3: Cross multiply
    2,132.87x = 3,199.50 × 816.62
  4. Step 4: Simplify right side
    2,132.87x = 2,612,759.69
  5. Step 5: Solve for x
    x = 2,612,759.69/2,132.87
  6. Step 6: Final answer
    x = 1,225.00

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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.