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Finding the Third Proportional to 242,112.50 and 400,128.75

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Solution

The third proportional to 242,112.50 and 400,128.75 is: 661,275.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    242,112.50 : 400,128.75 = 400,128.75 : x
  2. Step 2: Convert to fraction form
    242,112.50/400,128.75 = 400,128.75/x
  3. Step 3: Cross multiply
    242,112.50x = 400,128.75 × 400,128.75
  4. Step 4: Simplify right side
    242,112.50x = 160,103,016,576.56
  5. Step 5: Solve for x
    x = 160,103,016,576.56/242,112.50
  6. Step 6: Final answer
    x = 661,275.30

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Why These Related Problems?

These problems maintain the same ratio (1.65) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.