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Finding the Third Proportional to 257 and 437

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Solution

The third proportional to 257 and 437 is: 743.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    257 : 437 = 437 : x
  2. Step 2: Convert to fraction form
    257/437 = 437/x
  3. Step 3: Cross multiply
    257x = 437 × 437
  4. Step 4: Simplify right side
    257x = 190,969
  5. Step 5: Solve for x
    x = 190,969/257
  6. Step 6: Final answer
    x = 743.07

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Why These Related Problems?

These problems maintain the same ratio (1.70) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.