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Finding the Third Proportional to 287,157 and 421,851

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Solution

The third proportional to 287,157 and 421,851 is: 619,724.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,157 : 421,851 = 421,851 : x
  2. Step 2: Convert to fraction form
    287,157/421,851 = 421,851/x
  3. Step 3: Cross multiply
    287,157x = 421,851 × 421,851
  4. Step 4: Simplify right side
    287,157x = 177,958,266,201
  5. Step 5: Solve for x
    x = 177,958,266,201/287,157
  6. Step 6: Final answer
    x = 619,724.63

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These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.