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Finding the Third Proportional to 258,120 and 391,071

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Solution

The third proportional to 258,120 and 391,071 is: 592,501.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,120 : 391,071 = 391,071 : x
  2. Step 2: Convert to fraction form
    258,120/391,071 = 391,071/x
  3. Step 3: Cross multiply
    258,120x = 391,071 × 391,071
  4. Step 4: Simplify right side
    258,120x = 152,936,527,041
  5. Step 5: Solve for x
    x = 152,936,527,041/258,120
  6. Step 6: Final answer
    x = 592,501.65

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.