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Finding the Third Proportional to 324,432 and 455,328

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Solution

The third proportional to 324,432 and 455,328 is: 639,035.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,432 : 455,328 = 455,328 : x
  2. Step 2: Convert to fraction form
    324,432/455,328 = 455,328/x
  3. Step 3: Cross multiply
    324,432x = 455,328 × 455,328
  4. Step 4: Simplify right side
    324,432x = 207,323,587,584
  5. Step 5: Solve for x
    x = 207,323,587,584/324,432
  6. Step 6: Final answer
    x = 639,035.57

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.