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Finding the Third Proportional to 253,216 and 393,648

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Solution

The third proportional to 253,216 and 393,648 is: 611,962.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,216 : 393,648 = 393,648 : x
  2. Step 2: Convert to fraction form
    253,216/393,648 = 393,648/x
  3. Step 3: Cross multiply
    253,216x = 393,648 × 393,648
  4. Step 4: Simplify right side
    253,216x = 154,958,747,904
  5. Step 5: Solve for x
    x = 154,958,747,904/253,216
  6. Step 6: Final answer
    x = 611,962.70

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.