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Finding the Fourth Proportional to 887.20, 1,331.24 and 367.60

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Solution

The fourth proportional to 887.20, 1,331.24 and 367.60 is: 551.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.20 : 1,331.24 = 367.60 : x
  2. Step 2: Convert to fraction form
    887.20/1,331.24 = 367.60/x
  3. Step 3: Cross multiply
    887.20x = 1,331.24 × 367.60
  4. Step 4: Simplify right side
    887.20x = 489,363.82
  5. Step 5: Solve for x
    x = 489,363.82/887.20
  6. Step 6: Final answer
    x = 551.58

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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.