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Finding the Third Proportional to 312,915.38 and 686,722.50

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Solution

The third proportional to 312,915.38 and 686,722.50 is: 1,507,077.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,915.38 : 686,722.50 = 686,722.50 : x
  2. Step 2: Convert to fraction form
    312,915.38/686,722.50 = 686,722.50/x
  3. Step 3: Cross multiply
    312,915.38x = 686,722.50 × 686,722.50
  4. Step 4: Simplify right side
    312,915.38x = 471,587,792,006.25
  5. Step 5: Solve for x
    x = 471,587,792,006.25/312,915.38
  6. Step 6: Final answer
    x = 1,507,077.73

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.