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Finding the Fourth Proportional to 1,662.38, 2,293.98 and 998.84

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Solution

The fourth proportional to 1,662.38, 2,293.98 and 998.84 is: 1,378.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,662.38 : 2,293.98 = 998.84 : x
  2. Step 2: Convert to fraction form
    1,662.38/2,293.98 = 998.84/x
  3. Step 3: Cross multiply
    1,662.38x = 2,293.98 × 998.84
  4. Step 4: Simplify right side
    1,662.38x = 2,291,318.98
  5. Step 5: Solve for x
    x = 2,291,318.98/1,662.38
  6. Step 6: Final answer
    x = 1,378.34

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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.