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Finding the Fourth Proportional to 1,693, 2,336.34 and 994.78

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Solution

The fourth proportional to 1,693, 2,336.34 and 994.78 is: 1,372.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,693 : 2,336.34 = 994.78 : x
  2. Step 2: Convert to fraction form
    1,693/2,336.34 = 994.78/x
  3. Step 3: Cross multiply
    1,693x = 2,336.34 × 994.78
  4. Step 4: Simplify right side
    1,693x = 2,324,144.31
  5. Step 5: Solve for x
    x = 2,324,144.31/1,693
  6. Step 6: Final answer
    x = 1,372.80

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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.