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Finding the Third Proportional to 391,277 and 621,935

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Solution

The third proportional to 391,277 and 621,935 is: 988,566.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,277 : 621,935 = 621,935 : x
  2. Step 2: Convert to fraction form
    391,277/621,935 = 621,935/x
  3. Step 3: Cross multiply
    391,277x = 621,935 × 621,935
  4. Step 4: Simplify right side
    391,277x = 386,803,144,225
  5. Step 5: Solve for x
    x = 386,803,144,225/391,277
  6. Step 6: Final answer
    x = 988,566.01

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.