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Finding the Fourth Proportional to 704.66, 1,057.08 and 217.75

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Solution

The fourth proportional to 704.66, 1,057.08 and 217.75 is: 326.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    704.66 : 1,057.08 = 217.75 : x
  2. Step 2: Convert to fraction form
    704.66/1,057.08 = 217.75/x
  3. Step 3: Cross multiply
    704.66x = 1,057.08 × 217.75
  4. Step 4: Simplify right side
    704.66x = 230,178.08
  5. Step 5: Solve for x
    x = 230,178.08/704.66
  6. Step 6: Final answer
    x = 326.65

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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.