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Finding the Third Proportional to 118,212 and 256,518

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Solution

The third proportional to 118,212 and 256,518 is: 556,639.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,212 : 256,518 = 256,518 : x
  2. Step 2: Convert to fraction form
    118,212/256,518 = 256,518/x
  3. Step 3: Cross multiply
    118,212x = 256,518 × 256,518
  4. Step 4: Simplify right side
    118,212x = 65,801,484,324
  5. Step 5: Solve for x
    x = 65,801,484,324/118,212
  6. Step 6: Final answer
    x = 556,639.63

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.