Home / 2,922.30-4,031.46-1,928.79

Finding the Fourth Proportional to 2,922.30, 4,031.46 and 1,928.79

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Solution

The fourth proportional to 2,922.30, 4,031.46 and 1,928.79 is: 2,660.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,922.30 : 4,031.46 = 1,928.79 : x
  2. Step 2: Convert to fraction form
    2,922.30/4,031.46 = 1,928.79/x
  3. Step 3: Cross multiply
    2,922.30x = 4,031.46 × 1,928.79
  4. Step 4: Simplify right side
    2,922.30x = 7,775,839.73
  5. Step 5: Solve for x
    x = 7,775,839.73/2,922.30
  6. Step 6: Final answer
    x = 2,660.86

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1.5x scale

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.