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Finding the Third Proportional to 187,988 and 291,270

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Solution

The third proportional to 187,988 and 291,270 is: 451,295.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,988 : 291,270 = 291,270 : x
  2. Step 2: Convert to fraction form
    187,988/291,270 = 291,270/x
  3. Step 3: Cross multiply
    187,988x = 291,270 × 291,270
  4. Step 4: Simplify right side
    187,988x = 84,838,212,900
  5. Step 5: Solve for x
    x = 84,838,212,900/187,988
  6. Step 6: Final answer
    x = 451,295.90

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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.