Home / 2,129.71-2,939-1,198.21

Finding the Fourth Proportional to 2,129.71, 2,939 and 1,198.21

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Solution

The fourth proportional to 2,129.71, 2,939 and 1,198.21 is: 1,653.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.71 : 2,939 = 1,198.21 : x
  2. Step 2: Convert to fraction form
    2,129.71/2,939 = 1,198.21/x
  3. Step 3: Cross multiply
    2,129.71x = 2,939 × 1,198.21
  4. Step 4: Simplify right side
    2,129.71x = 3,521,524.50
  5. Step 5: Solve for x
    x = 3,521,524.50/2,129.71
  6. Step 6: Final answer
    x = 1,653.53

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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.