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Finding the Fourth Proportional to 1,394.31, 2,091.11 and 662.43

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Solution

The fourth proportional to 1,394.31, 2,091.11 and 662.43 is: 993.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,394.31 : 2,091.11 = 662.43 : x
  2. Step 2: Convert to fraction form
    1,394.31/2,091.11 = 662.43/x
  3. Step 3: Cross multiply
    1,394.31x = 2,091.11 × 662.43
  4. Step 4: Simplify right side
    1,394.31x = 1,385,210.69
  5. Step 5: Solve for x
    x = 1,385,210.69/1,394.31
  6. Step 6: Final answer
    x = 993.47

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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.