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Finding the Fourth Proportional to 574.72, 793.42 and 378.55

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Solution

The fourth proportional to 574.72, 793.42 and 378.55 is: 522.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.72 : 793.42 = 378.55 : x
  2. Step 2: Convert to fraction form
    574.72/793.42 = 378.55/x
  3. Step 3: Cross multiply
    574.72x = 793.42 × 378.55
  4. Step 4: Simplify right side
    574.72x = 300,349.14
  5. Step 5: Solve for x
    x = 300,349.14/574.72
  6. Step 6: Final answer
    x = 522.60

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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.