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Finding the Fourth Proportional to 461.36, 692.12 and 217.84

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Solution

The fourth proportional to 461.36, 692.12 and 217.84 is: 326.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.36 : 692.12 = 217.84 : x
  2. Step 2: Convert to fraction form
    461.36/692.12 = 217.84/x
  3. Step 3: Cross multiply
    461.36x = 692.12 × 217.84
  4. Step 4: Simplify right side
    461.36x = 150,771.42
  5. Step 5: Solve for x
    x = 150,771.42/461.36
  6. Step 6: Final answer
    x = 326.80

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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.