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Finding the Third Proportional to 643,520 and 1,413,928

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Solution

The third proportional to 643,520 and 1,413,928 is: 3,106,651.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,520 : 1,413,928 = 1,413,928 : x
  2. Step 2: Convert to fraction form
    643,520/1,413,928 = 1,413,928/x
  3. Step 3: Cross multiply
    643,520x = 1,413,928 × 1,413,928
  4. Step 4: Simplify right side
    643,520x = 1,999,192,389,184
  5. Step 5: Solve for x
    x = 1,999,192,389,184/643,520
  6. Step 6: Final answer
    x = 3,106,651.52

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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.