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Finding the Fourth Proportional to 260.72, 388.56 and 247.76

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Solution

The fourth proportional to 260.72, 388.56 and 247.76 is: 369.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.72 : 388.56 = 247.76 : x
  2. Step 2: Convert to fraction form
    260.72/388.56 = 247.76/x
  3. Step 3: Cross multiply
    260.72x = 388.56 × 247.76
  4. Step 4: Simplify right side
    260.72x = 96,269.63
  5. Step 5: Solve for x
    x = 96,269.63/260.72
  6. Step 6: Final answer
    x = 369.25

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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.