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Finding the Fourth Proportional to 260.49, 388.41 and 243.18

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Solution

The fourth proportional to 260.49, 388.41 and 243.18 is: 362.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.49 : 388.41 = 243.18 : x
  2. Step 2: Convert to fraction form
    260.49/388.41 = 243.18/x
  3. Step 3: Cross multiply
    260.49x = 388.41 × 243.18
  4. Step 4: Simplify right side
    260.49x = 94,453.54
  5. Step 5: Solve for x
    x = 94,453.54/260.49
  6. Step 6: Final answer
    x = 362.60

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.