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Finding the Fourth Proportional to 388.20, 582.14 and 144.59

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Solution

The fourth proportional to 388.20, 582.14 and 144.59 is: 216.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.20 : 582.14 = 144.59 : x
  2. Step 2: Convert to fraction form
    388.20/582.14 = 144.59/x
  3. Step 3: Cross multiply
    388.20x = 582.14 × 144.59
  4. Step 4: Simplify right side
    388.20x = 84,171.26
  5. Step 5: Solve for x
    x = 84,171.26/388.20
  6. Step 6: Final answer
    x = 216.83

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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.