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Finding the Fourth Proportional to 386.27, 578.57 and 248.87

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Solution

The fourth proportional to 386.27, 578.57 and 248.87 is: 372.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.27 : 578.57 = 248.87 : x
  2. Step 2: Convert to fraction form
    386.27/578.57 = 248.87/x
  3. Step 3: Cross multiply
    386.27x = 578.57 × 248.87
  4. Step 4: Simplify right side
    386.27x = 143,987.47
  5. Step 5: Solve for x
    x = 143,987.47/386.27
  6. Step 6: Final answer
    x = 372.76

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Why These Related Problems?

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