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Finding the Fourth Proportional to 2,299.70, 3,449.55 and 2,155.70

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Solution

The fourth proportional to 2,299.70, 3,449.55 and 2,155.70 is: 3,233.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,299.70 : 3,449.55 = 2,155.70 : x
  2. Step 2: Convert to fraction form
    2,299.70/3,449.55 = 2,155.70/x
  3. Step 3: Cross multiply
    2,299.70x = 3,449.55 × 2,155.70
  4. Step 4: Simplify right side
    2,299.70x = 7,436,194.94
  5. Step 5: Solve for x
    x = 7,436,194.94/2,299.70
  6. Step 6: Final answer
    x = 3,233.55

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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.