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Finding the Fourth Proportional to 692.35, 1,038.22 and 205.44

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Solution

The fourth proportional to 692.35, 1,038.22 and 205.44 is: 308.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    692.35 : 1,038.22 = 205.44 : x
  2. Step 2: Convert to fraction form
    692.35/1,038.22 = 205.44/x
  3. Step 3: Cross multiply
    692.35x = 1,038.22 × 205.44
  4. Step 4: Simplify right side
    692.35x = 213,291.92
  5. Step 5: Solve for x
    x = 213,291.92/692.35
  6. Step 6: Final answer
    x = 308.07

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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.