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Finding the Third Proportional to 621,976 and 990,168

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Solution

The third proportional to 621,976 and 990,168 is: 1,576,319.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,976 : 990,168 = 990,168 : x
  2. Step 2: Convert to fraction form
    621,976/990,168 = 990,168/x
  3. Step 3: Cross multiply
    621,976x = 990,168 × 990,168
  4. Step 4: Simplify right side
    621,976x = 980,432,668,224
  5. Step 5: Solve for x
    x = 980,432,668,224/621,976
  6. Step 6: Final answer
    x = 1,576,319.13

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.