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Finding the Third Proportional to 253,578 and 392,436

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Solution

The third proportional to 253,578 and 392,436 is: 607,331.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,578 : 392,436 = 392,436 : x
  2. Step 2: Convert to fraction form
    253,578/392,436 = 392,436/x
  3. Step 3: Cross multiply
    253,578x = 392,436 × 392,436
  4. Step 4: Simplify right side
    253,578x = 154,006,014,096
  5. Step 5: Solve for x
    x = 154,006,014,096/253,578
  6. Step 6: Final answer
    x = 607,331.92

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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.