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Finding the Third Proportional to 398,785 and 612,960

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Solution

The third proportional to 398,785 and 612,960 is: 942,161.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,785 : 612,960 = 612,960 : x
  2. Step 2: Convert to fraction form
    398,785/612,960 = 612,960/x
  3. Step 3: Cross multiply
    398,785x = 612,960 × 612,960
  4. Step 4: Simplify right side
    398,785x = 375,719,961,600
  5. Step 5: Solve for x
    x = 375,719,961,600/398,785
  6. Step 6: Final answer
    x = 942,161.72

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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.