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Finding the Third Proportional to 312,765 and 517,674

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Solution

The third proportional to 312,765 and 517,674 is: 856,829.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,765 : 517,674 = 517,674 : x
  2. Step 2: Convert to fraction form
    312,765/517,674 = 517,674/x
  3. Step 3: Cross multiply
    312,765x = 517,674 × 517,674
  4. Step 4: Simplify right side
    312,765x = 267,986,370,276
  5. Step 5: Solve for x
    x = 267,986,370,276/312,765
  6. Step 6: Final answer
    x = 856,829.79

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Why These Related Problems?

These problems maintain the same ratio (1.66) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.