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Finding the Third Proportional to 389,618 and 582,858

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Solution

The third proportional to 389,618 and 582,858 is: 871,939.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,618 : 582,858 = 582,858 : x
  2. Step 2: Convert to fraction form
    389,618/582,858 = 582,858/x
  3. Step 3: Cross multiply
    389,618x = 582,858 × 582,858
  4. Step 4: Simplify right side
    389,618x = 339,723,448,164
  5. Step 5: Solve for x
    x = 339,723,448,164/389,618
  6. Step 6: Final answer
    x = 871,939.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.