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Finding the Third Proportional to 312,174 and 663,222

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Solution

The third proportional to 312,174 and 663,222 is: 1,409,032.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,174 : 663,222 = 663,222 : x
  2. Step 2: Convert to fraction form
    312,174/663,222 = 663,222/x
  3. Step 3: Cross multiply
    312,174x = 663,222 × 663,222
  4. Step 4: Simplify right side
    312,174x = 439,863,421,284
  5. Step 5: Solve for x
    x = 439,863,421,284/312,174
  6. Step 6: Final answer
    x = 1,409,032.85

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.