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Finding the Fourth Proportional to 578.39, 798.23 and 329.79

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Solution

The fourth proportional to 578.39, 798.23 and 329.79 is: 455.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.39 : 798.23 = 329.79 : x
  2. Step 2: Convert to fraction form
    578.39/798.23 = 329.79/x
  3. Step 3: Cross multiply
    578.39x = 798.23 × 329.79
  4. Step 4: Simplify right side
    578.39x = 263,248.27
  5. Step 5: Solve for x
    x = 263,248.27/578.39
  6. Step 6: Final answer
    x = 455.14

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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.