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Finding the Fourth Proportional to 2,217.44, 3,327 and 678.56

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Solution

The fourth proportional to 2,217.44, 3,327 and 678.56 is: 1,018.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,217.44 : 3,327 = 678.56 : x
  2. Step 2: Convert to fraction form
    2,217.44/3,327 = 678.56/x
  3. Step 3: Cross multiply
    2,217.44x = 3,327 × 678.56
  4. Step 4: Simplify right side
    2,217.44x = 2,257,569.12
  5. Step 5: Solve for x
    x = 2,257,569.12/2,217.44
  6. Step 6: Final answer
    x = 1,018.10

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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.