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Finding the Third Proportional to 117,639 and 257,310

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Solution

The third proportional to 117,639 and 257,310 is: 562,810.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,639 : 257,310 = 257,310 : x
  2. Step 2: Convert to fraction form
    117,639/257,310 = 257,310/x
  3. Step 3: Cross multiply
    117,639x = 257,310 × 257,310
  4. Step 4: Simplify right side
    117,639x = 66,208,436,100
  5. Step 5: Solve for x
    x = 66,208,436,100/117,639
  6. Step 6: Final answer
    x = 562,810.26

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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.