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Finding the Third Proportional to 391,008 and 856,854

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Solution

The third proportional to 391,008 and 856,854 is: 1,877,707.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,008 : 856,854 = 856,854 : x
  2. Step 2: Convert to fraction form
    391,008/856,854 = 856,854/x
  3. Step 3: Cross multiply
    391,008x = 856,854 × 856,854
  4. Step 4: Simplify right side
    391,008x = 734,198,777,316
  5. Step 5: Solve for x
    x = 734,198,777,316/391,008
  6. Step 6: Final answer
    x = 1,877,707.81

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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.