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Finding the Fourth Proportional to 461.41, 692.80 and 218.11

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Solution

The fourth proportional to 461.41, 692.80 and 218.11 is: 327.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.41 : 692.80 = 218.11 : x
  2. Step 2: Convert to fraction form
    461.41/692.80 = 218.11/x
  3. Step 3: Cross multiply
    461.41x = 692.80 × 218.11
  4. Step 4: Simplify right side
    461.41x = 151,106.86
  5. Step 5: Solve for x
    x = 151,106.86/461.41
  6. Step 6: Final answer
    x = 327.49

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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.