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Finding the Third Proportional to 248,562 and 390,555

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Solution

The third proportional to 248,562 and 390,555 is: 613,662.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,562 : 390,555 = 390,555 : x
  2. Step 2: Convert to fraction form
    248,562/390,555 = 390,555/x
  3. Step 3: Cross multiply
    248,562x = 390,555 × 390,555
  4. Step 4: Simplify right side
    248,562x = 152,533,208,025
  5. Step 5: Solve for x
    x = 152,533,208,025/248,562
  6. Step 6: Final answer
    x = 613,662.62

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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.