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Finding the Fourth Proportional to 2,199.57, 3,299.34 and 660.57

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Solution

The fourth proportional to 2,199.57, 3,299.34 and 660.57 is: 990.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,199.57 : 3,299.34 = 660.57 : x
  2. Step 2: Convert to fraction form
    2,199.57/3,299.34 = 660.57/x
  3. Step 3: Cross multiply
    2,199.57x = 3,299.34 × 660.57
  4. Step 4: Simplify right side
    2,199.57x = 2,179,445.02
  5. Step 5: Solve for x
    x = 2,179,445.02/2,199.57
  6. Step 6: Final answer
    x = 990.85

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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.