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Finding the Third Proportional to 187,678 and 291,040

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Solution

The third proportional to 187,678 and 291,040 is: 451,327.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,678 : 291,040 = 291,040 : x
  2. Step 2: Convert to fraction form
    187,678/291,040 = 291,040/x
  3. Step 3: Cross multiply
    187,678x = 291,040 × 291,040
  4. Step 4: Simplify right side
    187,678x = 84,704,281,600
  5. Step 5: Solve for x
    x = 84,704,281,600/187,678
  6. Step 6: Final answer
    x = 451,327.71

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.