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Finding the Fourth Proportional to 287.73, 396.70 and 248.22

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Solution

The fourth proportional to 287.73, 396.70 and 248.22 is: 342.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    287.73 : 396.70 = 248.22 : x
  2. Step 2: Convert to fraction form
    287.73/396.70 = 248.22/x
  3. Step 3: Cross multiply
    287.73x = 396.70 × 248.22
  4. Step 4: Simplify right side
    287.73x = 98,468.25
  5. Step 5: Solve for x
    x = 98,468.25/287.73
  6. Step 6: Final answer
    x = 342.22

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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.