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Finding the Third Proportional to 205,440 and 315,336

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Solution

The third proportional to 205,440 and 315,336 is: 484,018.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,440 : 315,336 = 315,336 : x
  2. Step 2: Convert to fraction form
    205,440/315,336 = 315,336/x
  3. Step 3: Cross multiply
    205,440x = 315,336 × 315,336
  4. Step 4: Simplify right side
    205,440x = 99,436,792,896
  5. Step 5: Solve for x
    x = 99,436,792,896/205,440
  6. Step 6: Final answer
    x = 484,018.66

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.