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Finding the Fourth Proportional to 667.68, 999.96 and 493.68

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Solution

The fourth proportional to 667.68, 999.96 and 493.68 is: 739.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.68 : 999.96 = 493.68 : x
  2. Step 2: Convert to fraction form
    667.68/999.96 = 493.68/x
  3. Step 3: Cross multiply
    667.68x = 999.96 × 493.68
  4. Step 4: Simplify right side
    667.68x = 493,660.25
  5. Step 5: Solve for x
    x = 493,660.25/667.68
  6. Step 6: Final answer
    x = 739.37

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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.