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Finding the Fourth Proportional to 2,181.88, 3,273.36 and 642.88

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Solution

The fourth proportional to 2,181.88, 3,273.36 and 642.88 is: 964.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,181.88 : 3,273.36 = 642.88 : x
  2. Step 2: Convert to fraction form
    2,181.88/3,273.36 = 642.88/x
  3. Step 3: Cross multiply
    2,181.88x = 3,273.36 × 642.88
  4. Step 4: Simplify right side
    2,181.88x = 2,104,377.68
  5. Step 5: Solve for x
    x = 2,104,377.68/2,181.88
  6. Step 6: Final answer
    x = 964.48

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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.