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Finding the Third Proportional to 121,718 and 265,578

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Solution

The third proportional to 121,718 and 265,578 is: 579,467.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,718 : 265,578 = 265,578 : x
  2. Step 2: Convert to fraction form
    121,718/265,578 = 265,578/x
  3. Step 3: Cross multiply
    121,718x = 265,578 × 265,578
  4. Step 4: Simplify right side
    121,718x = 70,531,674,084
  5. Step 5: Solve for x
    x = 70,531,674,084/121,718
  6. Step 6: Final answer
    x = 579,467.90

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.