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Finding the Fourth Proportional to 892.74, 1,338.40 and 276.06

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Solution

The fourth proportional to 892.74, 1,338.40 and 276.06 is: 413.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    892.74 : 1,338.40 = 276.06 : x
  2. Step 2: Convert to fraction form
    892.74/1,338.40 = 276.06/x
  3. Step 3: Cross multiply
    892.74x = 1,338.40 × 276.06
  4. Step 4: Simplify right side
    892.74x = 369,478.70
  5. Step 5: Solve for x
    x = 369,478.70/892.74
  6. Step 6: Final answer
    x = 413.87

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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.