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Finding the Third Proportional to 239.63 and 515.63

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Solution

The third proportional to 239.63 and 515.63 is: 1,109.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.63 : 515.63 = 515.63 : x
  2. Step 2: Convert to fraction form
    239.63/515.63 = 515.63/x
  3. Step 3: Cross multiply
    239.63x = 515.63 × 515.63
  4. Step 4: Simplify right side
    239.63x = 265,869.14
  5. Step 5: Solve for x
    x = 265,869.14/239.63
  6. Step 6: Final answer
    x = 1,109.52

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.