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Finding the Third Proportional to 408,948 and 620,779

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Solution

The third proportional to 408,948 and 620,779 is: 942,336.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,948 : 620,779 = 620,779 : x
  2. Step 2: Convert to fraction form
    408,948/620,779 = 620,779/x
  3. Step 3: Cross multiply
    408,948x = 620,779 × 620,779
  4. Step 4: Simplify right side
    408,948x = 385,366,566,841
  5. Step 5: Solve for x
    x = 385,366,566,841/408,948
  6. Step 6: Final answer
    x = 942,336.35

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.