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Finding the Fourth Proportional to 725.11, 998.58 and 692.32

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Solution

The fourth proportional to 725.11, 998.58 and 692.32 is: 953.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    725.11 : 998.58 = 692.32 : x
  2. Step 2: Convert to fraction form
    725.11/998.58 = 692.32/x
  3. Step 3: Cross multiply
    725.11x = 998.58 × 692.32
  4. Step 4: Simplify right side
    725.11x = 691,336.91
  5. Step 5: Solve for x
    x = 691,336.91/725.11
  6. Step 6: Final answer
    x = 953.42

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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.