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Finding the Third Proportional to 257.50 and 304.50

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Solution

The third proportional to 257.50 and 304.50 is: 360.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    257.50 : 304.50 = 304.50 : x
  2. Step 2: Convert to fraction form
    257.50/304.50 = 304.50/x
  3. Step 3: Cross multiply
    257.50x = 304.50 × 304.50
  4. Step 4: Simplify right side
    257.50x = 92,720.25
  5. Step 5: Solve for x
    x = 92,720.25/257.50
  6. Step 6: Final answer
    x = 360.08

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Why These Related Problems?

These problems maintain the same ratio (1.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.