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Finding the Fourth Proportional to 1,076.82, 1,486.26 and 723.73

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Solution

The fourth proportional to 1,076.82, 1,486.26 and 723.73 is: 998.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,076.82 : 1,486.26 = 723.73 : x
  2. Step 2: Convert to fraction form
    1,076.82/1,486.26 = 723.73/x
  3. Step 3: Cross multiply
    1,076.82x = 1,486.26 × 723.73
  4. Step 4: Simplify right side
    1,076.82x = 1,075,650.95
  5. Step 5: Solve for x
    x = 1,075,650.95/1,076.82
  6. Step 6: Final answer
    x = 998.91

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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.