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Finding the Fourth Proportional to 388.72, 582.99 and 226.18

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Solution

The fourth proportional to 388.72, 582.99 and 226.18 is: 339.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.72 : 582.99 = 226.18 : x
  2. Step 2: Convert to fraction form
    388.72/582.99 = 226.18/x
  3. Step 3: Cross multiply
    388.72x = 582.99 × 226.18
  4. Step 4: Simplify right side
    388.72x = 131,860.68
  5. Step 5: Solve for x
    x = 131,860.68/388.72
  6. Step 6: Final answer
    x = 339.22

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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.