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Finding the Fourth Proportional to 729.25, 1,093.92 and 692.35

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Solution

The fourth proportional to 729.25, 1,093.92 and 692.35 is: 1,038.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    729.25 : 1,093.92 = 692.35 : x
  2. Step 2: Convert to fraction form
    729.25/1,093.92 = 692.35/x
  3. Step 3: Cross multiply
    729.25x = 1,093.92 × 692.35
  4. Step 4: Simplify right side
    729.25x = 757,366.58
  5. Step 5: Solve for x
    x = 757,366.58/729.25
  6. Step 6: Final answer
    x = 1,038.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.