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Finding the Fourth Proportional to 1,273.77, 1,906.81 and 1,152.09

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Solution

The fourth proportional to 1,273.77, 1,906.81 and 1,152.09 is: 1,724.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,273.77 : 1,906.81 = 1,152.09 : x
  2. Step 2: Convert to fraction form
    1,273.77/1,906.81 = 1,152.09/x
  3. Step 3: Cross multiply
    1,273.77x = 1,906.81 × 1,152.09
  4. Step 4: Simplify right side
    1,273.77x = 2,196,816.73
  5. Step 5: Solve for x
    x = 2,196,816.73/1,273.77
  6. Step 6: Final answer
    x = 1,724.66

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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.