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Finding the Third Proportional to 408,946 and 620,776

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Solution

The third proportional to 408,946 and 620,776 is: 942,331.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,946 : 620,776 = 620,776 : x
  2. Step 2: Convert to fraction form
    408,946/620,776 = 620,776/x
  3. Step 3: Cross multiply
    408,946x = 620,776 × 620,776
  4. Step 4: Simplify right side
    408,946x = 385,362,842,176
  5. Step 5: Solve for x
    x = 385,362,842,176/408,946
  6. Step 6: Final answer
    x = 942,331.85

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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.