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Finding the Third Proportional to 235.38 and 515.38

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Solution

The third proportional to 235.38 and 515.38 is: 1,128.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.38 : 515.38 = 515.38 : x
  2. Step 2: Convert to fraction form
    235.38/515.38 = 515.38/x
  3. Step 3: Cross multiply
    235.38x = 515.38 × 515.38
  4. Step 4: Simplify right side
    235.38x = 265,611.39
  5. Step 5: Solve for x
    x = 265,611.39/235.38
  6. Step 6: Final answer
    x = 1,128.46

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.