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Finding the Third Proportional to 262,640 and 393,880

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Solution

The third proportional to 262,640 and 393,880 is: 590,700.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,640 : 393,880 = 393,880 : x
  2. Step 2: Convert to fraction form
    262,640/393,880 = 393,880/x
  3. Step 3: Cross multiply
    262,640x = 393,880 × 393,880
  4. Step 4: Simplify right side
    262,640x = 155,141,454,400
  5. Step 5: Solve for x
    x = 155,141,454,400/262,640
  6. Step 6: Final answer
    x = 590,700.02

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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.