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Finding the Third Proportional to 155,214 and 316,989

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Solution

The third proportional to 155,214 and 316,989 is: 647,377.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,214 : 316,989 = 316,989 : x
  2. Step 2: Convert to fraction form
    155,214/316,989 = 316,989/x
  3. Step 3: Cross multiply
    155,214x = 316,989 × 316,989
  4. Step 4: Simplify right side
    155,214x = 100,482,026,121
  5. Step 5: Solve for x
    x = 100,482,026,121/155,214
  6. Step 6: Final answer
    x = 647,377.34

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Why These Related Problems?

These problems maintain the same ratio (2.04) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.