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Finding the Fourth Proportional to 704.97, 1,057.77 and 379.96

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Solution

The fourth proportional to 704.97, 1,057.77 and 379.96 is: 570.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    704.97 : 1,057.77 = 379.96 : x
  2. Step 2: Convert to fraction form
    704.97/1,057.77 = 379.96/x
  3. Step 3: Cross multiply
    704.97x = 1,057.77 × 379.96
  4. Step 4: Simplify right side
    704.97x = 401,910.29
  5. Step 5: Solve for x
    x = 401,910.29/704.97
  6. Step 6: Final answer
    x = 570.11

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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.