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Finding the Third Proportional to 136,336 and 318,420

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Solution

The third proportional to 136,336 and 318,420 is: 743,686.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,336 : 318,420 = 318,420 : x
  2. Step 2: Convert to fraction form
    136,336/318,420 = 318,420/x
  3. Step 3: Cross multiply
    136,336x = 318,420 × 318,420
  4. Step 4: Simplify right side
    136,336x = 101,391,296,400
  5. Step 5: Solve for x
    x = 101,391,296,400/136,336
  6. Step 6: Final answer
    x = 743,686.89

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Why These Related Problems?

These problems maintain the same ratio (2.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.