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Finding the Third Proportional to 398,783 and 612,959

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Solution

The third proportional to 398,783 and 612,959 is: 942,163.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,783 : 612,959 = 612,959 : x
  2. Step 2: Convert to fraction form
    398,783/612,959 = 612,959/x
  3. Step 3: Cross multiply
    398,783x = 612,959 × 612,959
  4. Step 4: Simplify right side
    398,783x = 375,718,735,681
  5. Step 5: Solve for x
    x = 375,718,735,681/398,783
  6. Step 6: Final answer
    x = 942,163.37

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.