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Finding the Fourth Proportional to 388.58, 582.30 and 251.54

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Solution

The fourth proportional to 388.58, 582.30 and 251.54 is: 376.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.58 : 582.30 = 251.54 : x
  2. Step 2: Convert to fraction form
    388.58/582.30 = 251.54/x
  3. Step 3: Cross multiply
    388.58x = 582.30 × 251.54
  4. Step 4: Simplify right side
    388.58x = 146,471.74
  5. Step 5: Solve for x
    x = 146,471.74/388.58
  6. Step 6: Final answer
    x = 376.94

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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.