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Finding the Fourth Proportional to 999.96, 1,499.94 and 422.46

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Solution

The fourth proportional to 999.96, 1,499.94 and 422.46 is: 633.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    999.96 : 1,499.94 = 422.46 : x
  2. Step 2: Convert to fraction form
    999.96/1,499.94 = 422.46/x
  3. Step 3: Cross multiply
    999.96x = 1,499.94 × 422.46
  4. Step 4: Simplify right side
    999.96x = 633,664.65
  5. Step 5: Solve for x
    x = 633,664.65/999.96
  6. Step 6: Final answer
    x = 633.69

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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.