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Finding the Fourth Proportional to 461.89, 692.49 and 279.24

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Solution

The fourth proportional to 461.89, 692.49 and 279.24 is: 418.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.89 : 692.49 = 279.24 : x
  2. Step 2: Convert to fraction form
    461.89/692.49 = 279.24/x
  3. Step 3: Cross multiply
    461.89x = 692.49 × 279.24
  4. Step 4: Simplify right side
    461.89x = 193,371.95
  5. Step 5: Solve for x
    x = 193,371.95/461.89
  6. Step 6: Final answer
    x = 418.65

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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.