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Finding the Third Proportional to 257,686 and 553,478

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Solution

The third proportional to 257,686 and 553,478 is: 1,188,803.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,686 : 553,478 = 553,478 : x
  2. Step 2: Convert to fraction form
    257,686/553,478 = 553,478/x
  3. Step 3: Cross multiply
    257,686x = 553,478 × 553,478
  4. Step 4: Simplify right side
    257,686x = 306,337,896,484
  5. Step 5: Solve for x
    x = 306,337,896,484/257,686
  6. Step 6: Final answer
    x = 1,188,803.03

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.