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Finding the Third Proportional to 124,920 and 257,040

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Solution

The third proportional to 124,920 and 257,040 is: 528,894.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,920 : 257,040 = 257,040 : x
  2. Step 2: Convert to fraction form
    124,920/257,040 = 257,040/x
  3. Step 3: Cross multiply
    124,920x = 257,040 × 257,040
  4. Step 4: Simplify right side
    124,920x = 66,069,561,600
  5. Step 5: Solve for x
    x = 66,069,561,600/124,920
  6. Step 6: Final answer
    x = 528,894.99

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Why These Related Problems?

These problems maintain the same ratio (2.06) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.