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Finding the Fourth Proportional to 1,331.97, 1,998.71 and 552.56

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Solution

The fourth proportional to 1,331.97, 1,998.71 and 552.56 is: 829.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,331.97 : 1,998.71 = 552.56 : x
  2. Step 2: Convert to fraction form
    1,331.97/1,998.71 = 552.56/x
  3. Step 3: Cross multiply
    1,331.97x = 1,998.71 × 552.56
  4. Step 4: Simplify right side
    1,331.97x = 1,104,394.44
  5. Step 5: Solve for x
    x = 1,104,394.44/1,331.97
  6. Step 6: Final answer
    x = 829.14

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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.