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Finding the Third Proportional to 262,890 and 393,886

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Solution

The third proportional to 262,890 and 393,886 is: 590,156.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,890 : 393,886 = 393,886 : x
  2. Step 2: Convert to fraction form
    262,890/393,886 = 393,886/x
  3. Step 3: Cross multiply
    262,890x = 393,886 × 393,886
  4. Step 4: Simplify right side
    262,890x = 155,146,180,996
  5. Step 5: Solve for x
    x = 155,146,180,996/262,890
  6. Step 6: Final answer
    x = 590,156.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.