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Finding the Fourth Proportional to 692.19, 1,037.07 and 679.55

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Solution

The fourth proportional to 692.19, 1,037.07 and 679.55 is: 1,018.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    692.19 : 1,037.07 = 679.55 : x
  2. Step 2: Convert to fraction form
    692.19/1,037.07 = 679.55/x
  3. Step 3: Cross multiply
    692.19x = 1,037.07 × 679.55
  4. Step 4: Simplify right side
    692.19x = 704,735.73
  5. Step 5: Solve for x
    x = 704,735.73/692.19
  6. Step 6: Final answer
    x = 1,018.12

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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.