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Finding the Third Proportional to 143,721 and 311,890.50

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Solution

The third proportional to 143,721 and 311,890.50 is: 676,836.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,721 : 311,890.50 = 311,890.50 : x
  2. Step 2: Convert to fraction form
    143,721/311,890.50 = 311,890.50/x
  3. Step 3: Cross multiply
    143,721x = 311,890.50 × 311,890.50
  4. Step 4: Simplify right side
    143,721x = 97,275,683,990.25
  5. Step 5: Solve for x
    x = 97,275,683,990.25/143,721
  6. Step 6: Final answer
    x = 676,836.95

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.