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Finding the Third Proportional to 158,513 and 330,121

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Solution

The third proportional to 158,513 and 330,121 is: 687,513.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,513 : 330,121 = 330,121 : x
  2. Step 2: Convert to fraction form
    158,513/330,121 = 330,121/x
  3. Step 3: Cross multiply
    158,513x = 330,121 × 330,121
  4. Step 4: Simplify right side
    158,513x = 108,979,874,641
  5. Step 5: Solve for x
    x = 108,979,874,641/158,513
  6. Step 6: Final answer
    x = 687,513.80

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.