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Finding the Third Proportional to 355,815 and 781,608

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Solution

The third proportional to 355,815 and 781,608 is: 1,716,934.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,815 : 781,608 = 781,608 : x
  2. Step 2: Convert to fraction form
    355,815/781,608 = 781,608/x
  3. Step 3: Cross multiply
    355,815x = 781,608 × 781,608
  4. Step 4: Simplify right side
    355,815x = 610,911,065,664
  5. Step 5: Solve for x
    x = 610,911,065,664/355,815
  6. Step 6: Final answer
    x = 1,716,934.55

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.