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Finding the Fourth Proportional to 992.44, 1,487.58 and 667

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Solution

The fourth proportional to 992.44, 1,487.58 and 667 is: 999.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    992.44 : 1,487.58 = 667 : x
  2. Step 2: Convert to fraction form
    992.44/1,487.58 = 667/x
  3. Step 3: Cross multiply
    992.44x = 1,487.58 × 667
  4. Step 4: Simplify right side
    992.44x = 992,215.86
  5. Step 5: Solve for x
    x = 992,215.86/992.44
  6. Step 6: Final answer
    x = 999.77

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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.