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Finding the Third Proportional to 310,078 and 438,879

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Solution

The third proportional to 310,078 and 438,879 is: 621,181.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,078 : 438,879 = 438,879 : x
  2. Step 2: Convert to fraction form
    310,078/438,879 = 438,879/x
  3. Step 3: Cross multiply
    310,078x = 438,879 × 438,879
  4. Step 4: Simplify right side
    310,078x = 192,614,776,641
  5. Step 5: Solve for x
    x = 192,614,776,641/310,078
  6. Step 6: Final answer
    x = 621,181.69

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.