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Finding the Third Proportional to 272,200.50 and 421,078.50

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Solution

The third proportional to 272,200.50 and 421,078.50 is: 651,384.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,200.50 : 421,078.50 = 421,078.50 : x
  2. Step 2: Convert to fraction form
    272,200.50/421,078.50 = 421,078.50/x
  3. Step 3: Cross multiply
    272,200.50x = 421,078.50 × 421,078.50
  4. Step 4: Simplify right side
    272,200.50x = 177,307,103,162.25
  5. Step 5: Solve for x
    x = 177,307,103,162.25/272,200.50
  6. Step 6: Final answer
    x = 651,384.19

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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.