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Finding the Third Proportional to 117,890 and 257,770

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Solution

The third proportional to 117,890 and 257,770 is: 563,621.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,890 : 257,770 = 257,770 : x
  2. Step 2: Convert to fraction form
    117,890/257,770 = 257,770/x
  3. Step 3: Cross multiply
    117,890x = 257,770 × 257,770
  4. Step 4: Simplify right side
    117,890x = 66,445,372,900
  5. Step 5: Solve for x
    x = 66,445,372,900/117,890
  6. Step 6: Final answer
    x = 563,621.79

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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.