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Finding the Third Proportional to 115,515 and 248,220

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Solution

The third proportional to 115,515 and 248,220 is: 533,378.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,515 : 248,220 = 248,220 : x
  2. Step 2: Convert to fraction form
    115,515/248,220 = 248,220/x
  3. Step 3: Cross multiply
    115,515x = 248,220 × 248,220
  4. Step 4: Simplify right side
    115,515x = 61,613,168,400
  5. Step 5: Solve for x
    x = 61,613,168,400/115,515
  6. Step 6: Final answer
    x = 533,378.08

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.