Home / 2,121.97-2,928.31-1,177.90

Finding the Fourth Proportional to 2,121.97, 2,928.31 and 1,177.90

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Solution

The fourth proportional to 2,121.97, 2,928.31 and 1,177.90 is: 1,625.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.97 : 2,928.31 = 1,177.90 : x
  2. Step 2: Convert to fraction form
    2,121.97/2,928.31 = 1,177.90/x
  3. Step 3: Cross multiply
    2,121.97x = 2,928.31 × 1,177.90
  4. Step 4: Simplify right side
    2,121.97x = 3,449,250.46
  5. Step 5: Solve for x
    x = 3,449,250.46/2,121.97
  6. Step 6: Final answer
    x = 1,625.50

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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.