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Finding the Third Proportional to 257,508 and 400,518

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Solution

The third proportional to 257,508 and 400,518 is: 622,950.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,508 : 400,518 = 400,518 : x
  2. Step 2: Convert to fraction form
    257,508/400,518 = 400,518/x
  3. Step 3: Cross multiply
    257,508x = 400,518 × 400,518
  4. Step 4: Simplify right side
    257,508x = 160,414,668,324
  5. Step 5: Solve for x
    x = 160,414,668,324/257,508
  6. Step 6: Final answer
    x = 622,950.23

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.