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Finding the Third Proportional to 399,298 and 873,620

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Solution

The third proportional to 399,298 and 873,620 is: 1,911,384.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,298 : 873,620 = 873,620 : x
  2. Step 2: Convert to fraction form
    399,298/873,620 = 873,620/x
  3. Step 3: Cross multiply
    399,298x = 873,620 × 873,620
  4. Step 4: Simplify right side
    399,298x = 763,211,904,400
  5. Step 5: Solve for x
    x = 763,211,904,400/399,298
  6. Step 6: Final answer
    x = 1,911,384.24

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.