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Finding the Third Proportional to 187,994 and 391,480

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Solution

The third proportional to 187,994 and 391,480 is: 815,220.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,994 : 391,480 = 391,480 : x
  2. Step 2: Convert to fraction form
    187,994/391,480 = 391,480/x
  3. Step 3: Cross multiply
    187,994x = 391,480 × 391,480
  4. Step 4: Simplify right side
    187,994x = 153,256,590,400
  5. Step 5: Solve for x
    x = 153,256,590,400/187,994
  6. Step 6: Final answer
    x = 815,220.65

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.