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Finding the Third Proportional to 643,968 and 1,398,555

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Solution

The third proportional to 643,968 and 1,398,555 is: 3,037,349.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,968 : 1,398,555 = 1,398,555 : x
  2. Step 2: Convert to fraction form
    643,968/1,398,555 = 1,398,555/x
  3. Step 3: Cross multiply
    643,968x = 1,398,555 × 1,398,555
  4. Step 4: Simplify right side
    643,968x = 1,955,956,088,025
  5. Step 5: Solve for x
    x = 1,955,956,088,025/643,968
  6. Step 6: Final answer
    x = 3,037,349.82

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.