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Finding the Third Proportional to 257.06 and 455.91

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Solution

The third proportional to 257.06 and 455.91 is: 808.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    257.06 : 455.91 = 455.91 : x
  2. Step 2: Convert to fraction form
    257.06/455.91 = 455.91/x
  3. Step 3: Cross multiply
    257.06x = 455.91 × 455.91
  4. Step 4: Simplify right side
    257.06x = 207,850.51
  5. Step 5: Solve for x
    x = 207,850.51/257.06
  6. Step 6: Final answer
    x = 808.56

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Why These Related Problems?

These problems maintain the same ratio (1.77) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.