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Finding the Third Proportional to 155,621 and 243,867

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Solution

The third proportional to 155,621 and 243,867 is: 382,153.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,621 : 243,867 = 243,867 : x
  2. Step 2: Convert to fraction form
    155,621/243,867 = 243,867/x
  3. Step 3: Cross multiply
    155,621x = 243,867 × 243,867
  4. Step 4: Simplify right side
    155,621x = 59,471,113,689
  5. Step 5: Solve for x
    x = 59,471,113,689/155,621
  6. Step 6: Final answer
    x = 382,153.52

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.