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Finding the Third Proportional to 235.50 and 515.63

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Solution

The third proportional to 235.50 and 515.63 is: 1,128.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.50 : 515.63 = 515.63 : x
  2. Step 2: Convert to fraction form
    235.50/515.63 = 515.63/x
  3. Step 3: Cross multiply
    235.50x = 515.63 × 515.63
  4. Step 4: Simplify right side
    235.50x = 265,869.14
  5. Step 5: Solve for x
    x = 265,869.14/235.50
  6. Step 6: Final answer
    x = 1,128.96

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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.