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Finding the Fourth Proportional to 388.26, 535.91 and 240.81

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Solution

The fourth proportional to 388.26, 535.91 and 240.81 is: 332.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.26 : 535.91 = 240.81 : x
  2. Step 2: Convert to fraction form
    388.26/535.91 = 240.81/x
  3. Step 3: Cross multiply
    388.26x = 535.91 × 240.81
  4. Step 4: Simplify right side
    388.26x = 129,052.49
  5. Step 5: Solve for x
    x = 129,052.49/388.26
  6. Step 6: Final answer
    x = 332.39

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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.