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Finding the Fourth Proportional to 378.78, 522.27 and 301.02

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Solution

The fourth proportional to 378.78, 522.27 and 301.02 is: 415.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.78 : 522.27 = 301.02 : x
  2. Step 2: Convert to fraction form
    378.78/522.27 = 301.02/x
  3. Step 3: Cross multiply
    378.78x = 522.27 × 301.02
  4. Step 4: Simplify right side
    378.78x = 157,213.72
  5. Step 5: Solve for x
    x = 157,213.72/378.78
  6. Step 6: Final answer
    x = 415.05

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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.