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Finding the Fourth Proportional to 578.83, 868.26 and 213.42

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Solution

The fourth proportional to 578.83, 868.26 and 213.42 is: 320.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.83 : 868.26 = 213.42 : x
  2. Step 2: Convert to fraction form
    578.83/868.26 = 213.42/x
  3. Step 3: Cross multiply
    578.83x = 868.26 × 213.42
  4. Step 4: Simplify right side
    578.83x = 185,301.59
  5. Step 5: Solve for x
    x = 185,301.59/578.83
  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.