Home / 2,921.25-4,031.70-1,928.60

Finding the Fourth Proportional to 2,921.25, 4,031.70 and 1,928.60

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Solution

The fourth proportional to 2,921.25, 4,031.70 and 1,928.60 is: 2,661.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,921.25 : 4,031.70 = 1,928.60 : x
  2. Step 2: Convert to fraction form
    2,921.25/4,031.70 = 1,928.60/x
  3. Step 3: Cross multiply
    2,921.25x = 4,031.70 × 1,928.60
  4. Step 4: Simplify right side
    2,921.25x = 7,775,516.46
  5. Step 5: Solve for x
    x = 7,775,516.46/2,921.25
  6. Step 6: Final answer
    x = 2,661.71

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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.