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Finding the Third Proportional to 265,040 and 393,960

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Solution

The third proportional to 265,040 and 393,960 is: 585,588.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,040 : 393,960 = 393,960 : x
  2. Step 2: Convert to fraction form
    265,040/393,960 = 393,960/x
  3. Step 3: Cross multiply
    265,040x = 393,960 × 393,960
  4. Step 4: Simplify right side
    265,040x = 155,204,481,600
  5. Step 5: Solve for x
    x = 155,204,481,600/265,040
  6. Step 6: Final answer
    x = 585,588.90

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.