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Finding the Fourth Proportional to 705.88, 1,057.20 and 397.27

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Solution

The fourth proportional to 705.88, 1,057.20 and 397.27 is: 594.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    705.88 : 1,057.20 = 397.27 : x
  2. Step 2: Convert to fraction form
    705.88/1,057.20 = 397.27/x
  3. Step 3: Cross multiply
    705.88x = 1,057.20 × 397.27
  4. Step 4: Simplify right side
    705.88x = 419,993.84
  5. Step 5: Solve for x
    x = 419,993.84/705.88
  6. Step 6: Final answer
    x = 594.99

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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.