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Finding the Fourth Proportional to 578.25, 798.39 and 403.29

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Solution

The fourth proportional to 578.25, 798.39 and 403.29 is: 556.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.25 : 798.39 = 403.29 : x
  2. Step 2: Convert to fraction form
    578.25/798.39 = 403.29/x
  3. Step 3: Cross multiply
    578.25x = 798.39 × 403.29
  4. Step 4: Simplify right side
    578.25x = 321,982.70
  5. Step 5: Solve for x
    x = 321,982.70/578.25
  6. Step 6: Final answer
    x = 556.82

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.