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Finding the Fourth Proportional to 463.27, 638.94 and 388.30

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Solution

The fourth proportional to 463.27, 638.94 and 388.30 is: 535.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.27 : 638.94 = 388.30 : x
  2. Step 2: Convert to fraction form
    463.27/638.94 = 388.30/x
  3. Step 3: Cross multiply
    463.27x = 638.94 × 388.30
  4. Step 4: Simplify right side
    463.27x = 248,100.40
  5. Step 5: Solve for x
    x = 248,100.40/463.27
  6. Step 6: Final answer
    x = 535.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.