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Finding the Fourth Proportional to 378.72, 568.62 and 248.31

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Solution

The fourth proportional to 378.72, 568.62 and 248.31 is: 372.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.72 : 568.62 = 248.31 : x
  2. Step 2: Convert to fraction form
    378.72/568.62 = 248.31/x
  3. Step 3: Cross multiply
    378.72x = 568.62 × 248.31
  4. Step 4: Simplify right side
    378.72x = 141,194.03
  5. Step 5: Solve for x
    x = 141,194.03/378.72
  6. Step 6: Final answer
    x = 372.82

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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.