Home / 2,629.35-3,938.74-1,309.12

Finding the Fourth Proportional to 2,629.35, 3,938.74 and 1,309.12

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Solution

The fourth proportional to 2,629.35, 3,938.74 and 1,309.12 is: 1,961.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,629.35 : 3,938.74 = 1,309.12 : x
  2. Step 2: Convert to fraction form
    2,629.35/3,938.74 = 1,309.12/x
  3. Step 3: Cross multiply
    2,629.35x = 3,938.74 × 1,309.12
  4. Step 4: Simplify right side
    2,629.35x = 5,156,257.07
  5. Step 5: Solve for x
    x = 5,156,257.07/2,629.35
  6. Step 6: Final answer
    x = 1,961.04

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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.