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Finding the Fourth Proportional to 2,199.70, 3,305.40 and 1,213.30

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Solution

The fourth proportional to 2,199.70, 3,305.40 and 1,213.30 is: 1,823.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,199.70 : 3,305.40 = 1,213.30 : x
  2. Step 2: Convert to fraction form
    2,199.70/3,305.40 = 1,213.30/x
  3. Step 3: Cross multiply
    2,199.70x = 3,305.40 × 1,213.30
  4. Step 4: Simplify right side
    2,199.70x = 4,010,441.82
  5. Step 5: Solve for x
    x = 4,010,441.82/2,199.70
  6. Step 6: Final answer
    x = 1,823.18

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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.