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Finding the Fourth Proportional to 578.67, 867.97 and 213.43

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Solution

The fourth proportional to 578.67, 867.97 and 213.43 is: 320.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.67 : 867.97 = 213.43 : x
  2. Step 2: Convert to fraction form
    578.67/867.97 = 213.43/x
  3. Step 3: Cross multiply
    578.67x = 867.97 × 213.43
  4. Step 4: Simplify right side
    578.67x = 185,250.84
  5. Step 5: Solve for x
    x = 185,250.84/578.67
  6. Step 6: Final answer
    x = 320.13

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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.