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Finding the Fourth Proportional to 1,660.98, 2,293.08 and 998

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Solution

The fourth proportional to 1,660.98, 2,293.08 and 998 is: 1,377.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,660.98 : 2,293.08 = 998 : x
  2. Step 2: Convert to fraction form
    1,660.98/2,293.08 = 998/x
  3. Step 3: Cross multiply
    1,660.98x = 2,293.08 × 998
  4. Step 4: Simplify right side
    1,660.98x = 2,288,493.84
  5. Step 5: Solve for x
    x = 2,288,493.84/1,660.98
  6. Step 6: Final answer
    x = 1,377.80

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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.