Home / 5,231.28-7,219.20-2,873.40

Finding the Fourth Proportional to 5,231.28, 7,219.20 and 2,873.40

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Solution

The fourth proportional to 5,231.28, 7,219.20 and 2,873.40 is: 3,965.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,231.28 : 7,219.20 = 2,873.40 : x
  2. Step 2: Convert to fraction form
    5,231.28/7,219.20 = 2,873.40/x
  3. Step 3: Cross multiply
    5,231.28x = 7,219.20 × 2,873.40
  4. Step 4: Simplify right side
    5,231.28x = 20,743,649.28
  5. Step 5: Solve for x
    x = 20,743,649.28/5,231.28
  6. Step 6: Final answer
    x = 3,965.31

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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.