Home / 3,945.79-5,445.18-2,177.39

Finding the Fourth Proportional to 3,945.79, 5,445.18 and 2,177.39

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Solution

The fourth proportional to 3,945.79, 5,445.18 and 2,177.39 is: 3,004.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,945.79 : 5,445.18 = 2,177.39 : x
  2. Step 2: Convert to fraction form
    3,945.79/5,445.18 = 2,177.39/x
  3. Step 3: Cross multiply
    3,945.79x = 5,445.18 × 2,177.39
  4. Step 4: Simplify right side
    3,945.79x = 11,856,280.48
  5. Step 5: Solve for x
    x = 11,856,280.48/3,945.79
  6. Step 6: Final answer
    x = 3,004.79

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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.