Home / 2,921.60-4,031.25-1,742.78

Finding the Fourth Proportional to 2,921.60, 4,031.25 and 1,742.78

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Solution

The fourth proportional to 2,921.60, 4,031.25 and 1,742.78 is: 2,404.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,921.60 : 4,031.25 = 1,742.78 : x
  2. Step 2: Convert to fraction form
    2,921.60/4,031.25 = 1,742.78/x
  3. Step 3: Cross multiply
    2,921.60x = 4,031.25 × 1,742.78
  4. Step 4: Simplify right side
    2,921.60x = 7,025,581.88
  5. Step 5: Solve for x
    x = 7,025,581.88/2,921.60
  6. Step 6: Final answer
    x = 2,404.70

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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.