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Finding the Fourth Proportional to 335.78, 503.78 and 238.47

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Solution

The fourth proportional to 335.78, 503.78 and 238.47 is: 357.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    335.78 : 503.78 = 238.47 : x
  2. Step 2: Convert to fraction form
    335.78/503.78 = 238.47/x
  3. Step 3: Cross multiply
    335.78x = 503.78 × 238.47
  4. Step 4: Simplify right side
    335.78x = 120,136.42
  5. Step 5: Solve for x
    x = 120,136.42/335.78
  6. Step 6: Final answer
    x = 357.78

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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.