Home / 1,906.29-2,629.80-1,242.90

Finding the Fourth Proportional to 1,906.29, 2,629.80 and 1,242.90

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Solution

The fourth proportional to 1,906.29, 2,629.80 and 1,242.90 is: 1,714.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,906.29 : 2,629.80 = 1,242.90 : x
  2. Step 2: Convert to fraction form
    1,906.29/2,629.80 = 1,242.90/x
  3. Step 3: Cross multiply
    1,906.29x = 2,629.80 × 1,242.90
  4. Step 4: Simplify right side
    1,906.29x = 3,268,578.42
  5. Step 5: Solve for x
    x = 3,268,578.42/1,906.29
  6. Step 6: Final answer
    x = 1,714.63

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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.