Home / 2,921.20-4,031.23-1,679.20

Finding the Fourth Proportional to 2,921.20, 4,031.23 and 1,679.20

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Solution

The fourth proportional to 2,921.20, 4,031.23 and 1,679.20 is: 2,317.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,921.20 : 4,031.23 = 1,679.20 : x
  2. Step 2: Convert to fraction form
    2,921.20/4,031.23 = 1,679.20/x
  3. Step 3: Cross multiply
    2,921.20x = 4,031.23 × 1,679.20
  4. Step 4: Simplify right side
    2,921.20x = 6,769,241.42
  5. Step 5: Solve for x
    x = 6,769,241.42/2,921.20
  6. Step 6: Final answer
    x = 2,317.28

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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.