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Finding the Third Proportional to 528,628 and 851,172

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Solution

The third proportional to 528,628 and 851,172 is: 1,370,517.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,628 : 851,172 = 851,172 : x
  2. Step 2: Convert to fraction form
    528,628/851,172 = 851,172/x
  3. Step 3: Cross multiply
    528,628x = 851,172 × 851,172
  4. Step 4: Simplify right side
    528,628x = 724,493,773,584
  5. Step 5: Solve for x
    x = 724,493,773,584/528,628
  6. Step 6: Final answer
    x = 1,370,517.21

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.