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Finding the Third Proportional to 257.38 and 560.25

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Solution

The third proportional to 257.38 and 560.25 is: 1,219.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    257.38 : 560.25 = 560.25 : x
  2. Step 2: Convert to fraction form
    257.38/560.25 = 560.25/x
  3. Step 3: Cross multiply
    257.38x = 560.25 × 560.25
  4. Step 4: Simplify right side
    257.38x = 313,880.06
  5. Step 5: Solve for x
    x = 313,880.06/257.38
  6. Step 6: Final answer
    x = 1,219.54

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.