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Finding the Fourth Proportional to 2,199.40, 3,299.03 and 812.17

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Solution

The fourth proportional to 2,199.40, 3,299.03 and 812.17 is: 1,218.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,199.40 : 3,299.03 = 812.17 : x
  2. Step 2: Convert to fraction form
    2,199.40/3,299.03 = 812.17/x
  3. Step 3: Cross multiply
    2,199.40x = 3,299.03 × 812.17
  4. Step 4: Simplify right side
    2,199.40x = 2,679,376.30
  5. Step 5: Solve for x
    x = 2,679,376.30/2,199.40
  6. Step 6: Final answer
    x = 1,218.23

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1.5x scale

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.