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Finding the Third Proportional to 459,940 and 989,864

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Solution

The third proportional to 459,940 and 989,864 is: 2,130,344.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,940 : 989,864 = 989,864 : x
  2. Step 2: Convert to fraction form
    459,940/989,864 = 989,864/x
  3. Step 3: Cross multiply
    459,940x = 989,864 × 989,864
  4. Step 4: Simplify right side
    459,940x = 979,830,738,496
  5. Step 5: Solve for x
    x = 979,830,738,496/459,940
  6. Step 6: Final answer
    x = 2,130,344.69

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.