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Finding the Third Proportional to 312,123.38 and 682,036.88

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Solution

The third proportional to 312,123.38 and 682,036.88 is: 1,490,353.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,123.38 : 682,036.88 = 682,036.88 : x
  2. Step 2: Convert to fraction form
    312,123.38/682,036.88 = 682,036.88/x
  3. Step 3: Cross multiply
    312,123.38x = 682,036.88 × 682,036.88
  4. Step 4: Simplify right side
    312,123.38x = 465,174,298,859.77
  5. Step 5: Solve for x
    x = 465,174,298,859.77/312,123.38
  6. Step 6: Final answer
    x = 1,490,353.93

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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.