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Finding the Third Proportional to 117,120 and 257,472

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Solution

The third proportional to 117,120 and 257,472 is: 566,016.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,120 : 257,472 = 257,472 : x
  2. Step 2: Convert to fraction form
    117,120/257,472 = 257,472/x
  3. Step 3: Cross multiply
    117,120x = 257,472 × 257,472
  4. Step 4: Simplify right side
    117,120x = 66,291,830,784
  5. Step 5: Solve for x
    x = 66,291,830,784/117,120
  6. Step 6: Final answer
    x = 566,016.31

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.