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Finding the Fourth Proportional to 887.78, 1,331.55 and 238.56

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Solution

The fourth proportional to 887.78, 1,331.55 and 238.56 is: 357.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.78 : 1,331.55 = 238.56 : x
  2. Step 2: Convert to fraction form
    887.78/1,331.55 = 238.56/x
  3. Step 3: Cross multiply
    887.78x = 1,331.55 × 238.56
  4. Step 4: Simplify right side
    887.78x = 317,654.57
  5. Step 5: Solve for x
    x = 317,654.57/887.78
  6. Step 6: Final answer
    x = 357.81

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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.