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Finding the Third Proportional to 310,392 and 661,488

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Solution

The third proportional to 310,392 and 661,488 is: 1,409,721.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,392 : 661,488 = 661,488 : x
  2. Step 2: Convert to fraction form
    310,392/661,488 = 661,488/x
  3. Step 3: Cross multiply
    310,392x = 661,488 × 661,488
  4. Step 4: Simplify right side
    310,392x = 437,566,374,144
  5. Step 5: Solve for x
    x = 437,566,374,144/310,392
  6. Step 6: Final answer
    x = 1,409,721.82

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.