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Finding the Third Proportional to 124,215 and 257,286

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Solution

The third proportional to 124,215 and 257,286 is: 532,915.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,215 : 257,286 = 257,286 : x
  2. Step 2: Convert to fraction form
    124,215/257,286 = 257,286/x
  3. Step 3: Cross multiply
    124,215x = 257,286 × 257,286
  4. Step 4: Simplify right side
    124,215x = 66,196,085,796
  5. Step 5: Solve for x
    x = 66,196,085,796/124,215
  6. Step 6: Final answer
    x = 532,915.40

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Why These Related Problems?

These problems maintain the same ratio (2.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.