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Finding the Fourth Proportional to 378.86, 568.42 and 233.55

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Solution

The fourth proportional to 378.86, 568.42 and 233.55 is: 350.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.86 : 568.42 = 233.55 : x
  2. Step 2: Convert to fraction form
    378.86/568.42 = 233.55/x
  3. Step 3: Cross multiply
    378.86x = 568.42 × 233.55
  4. Step 4: Simplify right side
    378.86x = 132,750.48
  5. Step 5: Solve for x
    x = 132,750.48/378.86
  6. Step 6: Final answer
    x = 350.40

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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.