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Finding the Third Proportional to 135,240 and 210,240

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Solution

The third proportional to 135,240 and 210,240 is: 326,832.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,240 : 210,240 = 210,240 : x
  2. Step 2: Convert to fraction form
    135,240/210,240 = 210,240/x
  3. Step 3: Cross multiply
    135,240x = 210,240 × 210,240
  4. Step 4: Simplify right side
    135,240x = 44,200,857,600
  5. Step 5: Solve for x
    x = 44,200,857,600/135,240
  6. Step 6: Final answer
    x = 326,832.72

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.