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Finding the Fourth Proportional to 892.07, 1,338.39 and 275.78

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Solution

The fourth proportional to 892.07, 1,338.39 and 275.78 is: 413.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    892.07 : 1,338.39 = 275.78 : x
  2. Step 2: Convert to fraction form
    892.07/1,338.39 = 275.78/x
  3. Step 3: Cross multiply
    892.07x = 1,338.39 × 275.78
  4. Step 4: Simplify right side
    892.07x = 369,094.50
  5. Step 5: Solve for x
    x = 369,094.50/892.07
  6. Step 6: Final answer
    x = 413.75

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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.