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Finding the Third Proportional to 285,910 and 419,312

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Solution

The third proportional to 285,910 and 419,312 is: 614,957.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,910 : 419,312 = 419,312 : x
  2. Step 2: Convert to fraction form
    285,910/419,312 = 419,312/x
  3. Step 3: Cross multiply
    285,910x = 419,312 × 419,312
  4. Step 4: Simplify right side
    285,910x = 175,822,553,344
  5. Step 5: Solve for x
    x = 175,822,553,344/285,910
  6. Step 6: Final answer
    x = 614,957.69

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.