Home / 1,906.12-2,629.02-1,207.72

Finding the Fourth Proportional to 1,906.12, 2,629.02 and 1,207.72

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Solution

The fourth proportional to 1,906.12, 2,629.02 and 1,207.72 is: 1,665.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,906.12 : 2,629.02 = 1,207.72 : x
  2. Step 2: Convert to fraction form
    1,906.12/2,629.02 = 1,207.72/x
  3. Step 3: Cross multiply
    1,906.12x = 2,629.02 × 1,207.72
  4. Step 4: Simplify right side
    1,906.12x = 3,175,120.03
  5. Step 5: Solve for x
    x = 3,175,120.03/1,906.12
  6. Step 6: Final answer
    x = 1,665.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.