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Finding the Fourth Proportional to 388.68, 582.96 and 226.20

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Solution

The fourth proportional to 388.68, 582.96 and 226.20 is: 339.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.68 : 582.96 = 226.20 : x
  2. Step 2: Convert to fraction form
    388.68/582.96 = 226.20/x
  3. Step 3: Cross multiply
    388.68x = 582.96 × 226.20
  4. Step 4: Simplify right side
    388.68x = 131,865.55
  5. Step 5: Solve for x
    x = 131,865.55/388.68
  6. Step 6: Final answer
    x = 339.27

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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.