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Finding the Fourth Proportional to 258.32, 386.64 and 248.24

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Solution

The fourth proportional to 258.32, 386.64 and 248.24 is: 371.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.32 : 386.64 = 248.24 : x
  2. Step 2: Convert to fraction form
    258.32/386.64 = 248.24/x
  3. Step 3: Cross multiply
    258.32x = 386.64 × 248.24
  4. Step 4: Simplify right side
    258.32x = 95,979.51
  5. Step 5: Solve for x
    x = 95,979.51/258.32
  6. Step 6: Final answer
    x = 371.55

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.