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Finding the Fourth Proportional to 1,777.73, 2,453.34 and 991.94

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Solution

The fourth proportional to 1,777.73, 2,453.34 and 991.94 is: 1,368.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,777.73 : 2,453.34 = 991.94 : x
  2. Step 2: Convert to fraction form
    1,777.73/2,453.34 = 991.94/x
  3. Step 3: Cross multiply
    1,777.73x = 2,453.34 × 991.94
  4. Step 4: Simplify right side
    1,777.73x = 2,433,553.81
  5. Step 5: Solve for x
    x = 2,433,553.81/1,777.73
  6. Step 6: Final answer
    x = 1,368.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.