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Finding the Fourth Proportional to 461.35, 692.12 and 136.72

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Solution

The fourth proportional to 461.35, 692.12 and 136.72 is: 205.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.35 : 692.12 = 136.72 : x
  2. Step 2: Convert to fraction form
    461.35/692.12 = 136.72/x
  3. Step 3: Cross multiply
    461.35x = 692.12 × 136.72
  4. Step 4: Simplify right side
    461.35x = 94,626.65
  5. Step 5: Solve for x
    x = 94,626.65/461.35
  6. Step 6: Final answer
    x = 205.11

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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.