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Finding the Fourth Proportional to 887.38, 1,330.89 and 271.12

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Solution

The fourth proportional to 887.38, 1,330.89 and 271.12 is: 406.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.38 : 1,330.89 = 271.12 : x
  2. Step 2: Convert to fraction form
    887.38/1,330.89 = 271.12/x
  3. Step 3: Cross multiply
    887.38x = 1,330.89 × 271.12
  4. Step 4: Simplify right side
    887.38x = 360,830.90
  5. Step 5: Solve for x
    x = 360,830.90/887.38
  6. Step 6: Final answer
    x = 406.63

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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.