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Finding the Third Proportional to 506,917 and 784,640

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Solution

The third proportional to 506,917 and 784,640 is: 1,214,518.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    506,917 : 784,640 = 784,640 : x
  2. Step 2: Convert to fraction form
    506,917/784,640 = 784,640/x
  3. Step 3: Cross multiply
    506,917x = 784,640 × 784,640
  4. Step 4: Simplify right side
    506,917x = 615,659,929,600
  5. Step 5: Solve for x
    x = 615,659,929,600/506,917
  6. Step 6: Final answer
    x = 1,214,518.21

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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.