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Finding the Third Proportional to 253,608 and 392,490

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Solution

The third proportional to 253,608 and 392,490 is: 607,427.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,608 : 392,490 = 392,490 : x
  2. Step 2: Convert to fraction form
    253,608/392,490 = 392,490/x
  3. Step 3: Cross multiply
    253,608x = 392,490 × 392,490
  4. Step 4: Simplify right side
    253,608x = 154,048,400,100
  5. Step 5: Solve for x
    x = 154,048,400,100/253,608
  6. Step 6: Final answer
    x = 607,427.21

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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.