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Finding the Third Proportional to 506 and 1,357

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Solution

The third proportional to 506 and 1,357 is: 3,639.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    506 : 1,357 = 1,357 : x
  2. Step 2: Convert to fraction form
    506/1,357 = 1,357/x
  3. Step 3: Cross multiply
    506x = 1,357 × 1,357
  4. Step 4: Simplify right side
    506x = 1,841,449
  5. Step 5: Solve for x
    x = 1,841,449/506
  6. Step 6: Final answer
    x = 3,639.23

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Why These Related Problems?

These problems maintain the same ratio (2.68) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.