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Finding the Third Proportional to 390,247.50 and 851,217

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Solution

The third proportional to 390,247.50 and 851,217 is: 1,856,694.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,247.50 : 851,217 = 851,217 : x
  2. Step 2: Convert to fraction form
    390,247.50/851,217 = 851,217/x
  3. Step 3: Cross multiply
    390,247.50x = 851,217 × 851,217
  4. Step 4: Simplify right side
    390,247.50x = 724,570,381,089
  5. Step 5: Solve for x
    x = 724,570,381,089/390,247.50
  6. Step 6: Final answer
    x = 1,856,694.49

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.