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Finding the Fourth Proportional to 729.88, 1,089.96 and 692.44

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Solution

The fourth proportional to 729.88, 1,089.96 and 692.44 is: 1,034.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    729.88 : 1,089.96 = 692.44 : x
  2. Step 2: Convert to fraction form
    729.88/1,089.96 = 692.44/x
  3. Step 3: Cross multiply
    729.88x = 1,089.96 × 692.44
  4. Step 4: Simplify right side
    729.88x = 754,731.90
  5. Step 5: Solve for x
    x = 754,731.90/729.88
  6. Step 6: Final answer
    x = 1,034.05

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.