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Finding the Fourth Proportional to 667.08, 999.69 and 636.09

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Solution

The fourth proportional to 667.08, 999.69 and 636.09 is: 953.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.08 : 999.69 = 636.09 : x
  2. Step 2: Convert to fraction form
    667.08/999.69 = 636.09/x
  3. Step 3: Cross multiply
    667.08x = 999.69 × 636.09
  4. Step 4: Simplify right side
    667.08x = 635,892.81
  5. Step 5: Solve for x
    x = 635,892.81/667.08
  6. Step 6: Final answer
    x = 953.25

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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.