Home / 2,120.20-3,181.50-888.76

Finding the Fourth Proportional to 2,120.20, 3,181.50 and 888.76

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Solution

The fourth proportional to 2,120.20, 3,181.50 and 888.76 is: 1,333.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.20 : 3,181.50 = 888.76 : x
  2. Step 2: Convert to fraction form
    2,120.20/3,181.50 = 888.76/x
  3. Step 3: Cross multiply
    2,120.20x = 3,181.50 × 888.76
  4. Step 4: Simplify right side
    2,120.20x = 2,827,589.94
  5. Step 5: Solve for x
    x = 2,827,589.94/2,120.20
  6. Step 6: Final answer
    x = 1,333.64

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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.