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Finding the Fourth Proportional to 388.38, 582.28 and 203.03

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Solution

The fourth proportional to 388.38, 582.28 and 203.03 is: 304.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.38 : 582.28 = 203.03 : x
  2. Step 2: Convert to fraction form
    388.38/582.28 = 203.03/x
  3. Step 3: Cross multiply
    388.38x = 582.28 × 203.03
  4. Step 4: Simplify right side
    388.38x = 118,216.89
  5. Step 5: Solve for x
    x = 118,216.89/388.38
  6. Step 6: Final answer
    x = 304.38

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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.