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Finding the Fourth Proportional to 1,151.37, 1,727.87 and 891.97

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Solution

The fourth proportional to 1,151.37, 1,727.87 and 891.97 is: 1,338.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,151.37 : 1,727.87 = 891.97 : x
  2. Step 2: Convert to fraction form
    1,151.37/1,727.87 = 891.97/x
  3. Step 3: Cross multiply
    1,151.37x = 1,727.87 × 891.97
  4. Step 4: Simplify right side
    1,151.37x = 1,541,208.20
  5. Step 5: Solve for x
    x = 1,541,208.20/1,151.37
  6. Step 6: Final answer
    x = 1,338.59

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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.