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Finding the Fourth Proportional to 704.41, 1,056.78 and 217.44

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Solution

The fourth proportional to 704.41, 1,056.78 and 217.44 is: 326.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    704.41 : 1,056.78 = 217.44 : x
  2. Step 2: Convert to fraction form
    704.41/1,056.78 = 217.44/x
  3. Step 3: Cross multiply
    704.41x = 1,056.78 × 217.44
  4. Step 4: Simplify right side
    704.41x = 229,786.24
  5. Step 5: Solve for x
    x = 229,786.24/704.41
  6. Step 6: Final answer
    x = 326.21

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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.