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Finding the Third Proportional to 310,012 and 438,788

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Solution

The third proportional to 310,012 and 438,788 is: 621,056.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,012 : 438,788 = 438,788 : x
  2. Step 2: Convert to fraction form
    310,012/438,788 = 438,788/x
  3. Step 3: Cross multiply
    310,012x = 438,788 × 438,788
  4. Step 4: Simplify right side
    310,012x = 192,534,908,944
  5. Step 5: Solve for x
    x = 192,534,908,944/310,012
  6. Step 6: Final answer
    x = 621,056.31

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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.