Home / 1,629.94-2,249.31-921.79

Finding the Fourth Proportional to 1,629.94, 2,249.31 and 921.79

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Solution

The fourth proportional to 1,629.94, 2,249.31 and 921.79 is: 1,272.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,629.94 : 2,249.31 = 921.79 : x
  2. Step 2: Convert to fraction form
    1,629.94/2,249.31 = 921.79/x
  3. Step 3: Cross multiply
    1,629.94x = 2,249.31 × 921.79
  4. Step 4: Simplify right side
    1,629.94x = 2,073,391.46
  5. Step 5: Solve for x
    x = 2,073,391.46/1,629.94
  6. Step 6: Final answer
    x = 1,272.07

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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.