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Finding the Third Proportional to 122,760 and 256,428

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Solution

The third proportional to 122,760 and 256,428 is: 535,641.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,760 : 256,428 = 256,428 : x
  2. Step 2: Convert to fraction form
    122,760/256,428 = 256,428/x
  3. Step 3: Cross multiply
    122,760x = 256,428 × 256,428
  4. Step 4: Simplify right side
    122,760x = 65,755,319,184
  5. Step 5: Solve for x
    x = 65,755,319,184/122,760
  6. Step 6: Final answer
    x = 535,641.24

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Why These Related Problems?

These problems maintain the same ratio (2.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.