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Finding the Fourth Proportional to 388.26, 535.79 and 230.96

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Solution

The fourth proportional to 388.26, 535.79 and 230.96 is: 318.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.26 : 535.79 = 230.96 : x
  2. Step 2: Convert to fraction form
    388.26/535.79 = 230.96/x
  3. Step 3: Cross multiply
    388.26x = 535.79 × 230.96
  4. Step 4: Simplify right side
    388.26x = 123,746.06
  5. Step 5: Solve for x
    x = 123,746.06/388.26
  6. Step 6: Final answer
    x = 318.72

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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.