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Finding the Third Proportional to 999.42 and 1,379.53

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Solution

The third proportional to 999.42 and 1,379.53 is: 1,904.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    999.42 : 1,379.53 = 1,379.53 : x
  2. Step 2: Convert to fraction form
    999.42/1,379.53 = 1,379.53/x
  3. Step 3: Cross multiply
    999.42x = 1,379.53 × 1,379.53
  4. Step 4: Simplify right side
    999.42x = 1,903,106.47
  5. Step 5: Solve for x
    x = 1,903,106.47/999.42
  6. Step 6: Final answer
    x = 1,904.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.