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Finding the Third Proportional to 143,431.25 and 312,195.25

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Solution

The third proportional to 143,431.25 and 312,195.25 is: 679,530.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,431.25 : 312,195.25 = 312,195.25 : x
  2. Step 2: Convert to fraction form
    143,431.25/312,195.25 = 312,195.25/x
  3. Step 3: Cross multiply
    143,431.25x = 312,195.25 × 312,195.25
  4. Step 4: Simplify right side
    143,431.25x = 97,465,874,122.56
  5. Step 5: Solve for x
    x = 97,465,874,122.56/143,431.25
  6. Step 6: Final answer
    x = 679,530.26

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.