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Finding the Third Proportional to 248,256 and 393,288

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Solution

The third proportional to 248,256 and 393,288 is: 623,048.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,256 : 393,288 = 393,288 : x
  2. Step 2: Convert to fraction form
    248,256/393,288 = 393,288/x
  3. Step 3: Cross multiply
    248,256x = 393,288 × 393,288
  4. Step 4: Simplify right side
    248,256x = 154,675,450,944
  5. Step 5: Solve for x
    x = 154,675,450,944/248,256
  6. Step 6: Final answer
    x = 623,048.19

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.