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Finding the Third Proportional to 475,780 and 645,846

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Solution

The third proportional to 475,780 and 645,846 is: 876,701.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    475,780 : 645,846 = 645,846 : x
  2. Step 2: Convert to fraction form
    475,780/645,846 = 645,846/x
  3. Step 3: Cross multiply
    475,780x = 645,846 × 645,846
  4. Step 4: Simplify right side
    475,780x = 417,117,055,716
  5. Step 5: Solve for x
    x = 417,117,055,716/475,780
  6. Step 6: Final answer
    x = 876,701.53

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.