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Finding the Third Proportional to 143,680 and 312,230

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Solution

The third proportional to 143,680 and 312,230 is: 678,504.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,680 : 312,230 = 312,230 : x
  2. Step 2: Convert to fraction form
    143,680/312,230 = 312,230/x
  3. Step 3: Cross multiply
    143,680x = 312,230 × 312,230
  4. Step 4: Simplify right side
    143,680x = 97,487,572,900
  5. Step 5: Solve for x
    x = 97,487,572,900/143,680
  6. Step 6: Final answer
    x = 678,504.82

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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.