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Finding the Fourth Proportional to 631,629.78, 871,651.37 and 345,149.88

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Solution

The fourth proportional to 631,629.78, 871,651.37 and 345,149.88 is: 476,308.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,629.78 : 871,651.37 = 345,149.88 : x
  2. Step 2: Convert to fraction form
    631,629.78/871,651.37 = 345,149.88/x
  3. Step 3: Cross multiply
    631,629.78x = 871,651.37 × 345,149.88
  4. Step 4: Simplify right side
    631,629.78x = 300,850,365,757.34
  5. Step 5: Solve for x
    x = 300,850,365,757.34/631,629.78
  6. Step 6: Final answer
    x = 476,308.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.