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Finding the Third Proportional to 326,918 and 506,415

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Solution

The third proportional to 326,918 and 506,415 is: 784,466.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,918 : 506,415 = 506,415 : x
  2. Step 2: Convert to fraction form
    326,918/506,415 = 506,415/x
  3. Step 3: Cross multiply
    326,918x = 506,415 × 506,415
  4. Step 4: Simplify right side
    326,918x = 256,456,152,225
  5. Step 5: Solve for x
    x = 256,456,152,225/326,918
  6. Step 6: Final answer
    x = 784,466.29

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.