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Finding the Fourth Proportional to 578.49, 798.28 and 329.85

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Solution

The fourth proportional to 578.49, 798.28 and 329.85 is: 455.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.49 : 798.28 = 329.85 : x
  2. Step 2: Convert to fraction form
    578.49/798.28 = 329.85/x
  3. Step 3: Cross multiply
    578.49x = 798.28 × 329.85
  4. Step 4: Simplify right side
    578.49x = 263,312.66
  5. Step 5: Solve for x
    x = 263,312.66/578.49
  6. Step 6: Final answer
    x = 455.17

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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.