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Finding the Fourth Proportional to 1,661.38, 2,292.60 and 997.84

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Solution

The fourth proportional to 1,661.38, 2,292.60 and 997.84 is: 1,376.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,661.38 : 2,292.60 = 997.84 : x
  2. Step 2: Convert to fraction form
    1,661.38/2,292.60 = 997.84/x
  3. Step 3: Cross multiply
    1,661.38x = 2,292.60 × 997.84
  4. Step 4: Simplify right side
    1,661.38x = 2,287,647.98
  5. Step 5: Solve for x
    x = 2,287,647.98/1,661.38
  6. Step 6: Final answer
    x = 1,376.96

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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.