Home / 2,181.20-3,270.36-881.36

Finding the Fourth Proportional to 2,181.20, 3,270.36 and 881.36

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Solution

The fourth proportional to 2,181.20, 3,270.36 and 881.36 is: 1,321.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,181.20 : 3,270.36 = 881.36 : x
  2. Step 2: Convert to fraction form
    2,181.20/3,270.36 = 881.36/x
  3. Step 3: Cross multiply
    2,181.20x = 3,270.36 × 881.36
  4. Step 4: Simplify right side
    2,181.20x = 2,882,364.49
  5. Step 5: Solve for x
    x = 2,882,364.49/2,181.20
  6. Step 6: Final answer
    x = 1,321.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.