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Finding the Fourth Proportional to 2,600.29, 3,900.44 and 1,213.21

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Solution

The fourth proportional to 2,600.29, 3,900.44 and 1,213.21 is: 1,819.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,600.29 : 3,900.44 = 1,213.21 : x
  2. Step 2: Convert to fraction form
    2,600.29/3,900.44 = 1,213.21/x
  3. Step 3: Cross multiply
    2,600.29x = 3,900.44 × 1,213.21
  4. Step 4: Simplify right side
    2,600.29x = 4,732,052.81
  5. Step 5: Solve for x
    x = 4,732,052.81/2,600.29
  6. Step 6: Final answer
    x = 1,819.82

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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.