Home / 1,629.90-2,249.23-921.73

Finding the Fourth Proportional to 1,629.90, 2,249.23 and 921.73

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Solution

The fourth proportional to 1,629.90, 2,249.23 and 921.73 is: 1,271.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,629.90 : 2,249.23 = 921.73 : x
  2. Step 2: Convert to fraction form
    1,629.90/2,249.23 = 921.73/x
  3. Step 3: Cross multiply
    1,629.90x = 2,249.23 × 921.73
  4. Step 4: Simplify right side
    1,629.90x = 2,073,178.16
  5. Step 5: Solve for x
    x = 2,073,178.16/1,629.90
  6. Step 6: Final answer
    x = 1,271.97

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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.