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Finding the Fourth Proportional to 631,478.80, 871,441.42 and 345,003.66

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Solution

The fourth proportional to 631,478.80, 871,441.42 and 345,003.66 is: 476,105.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,478.80 : 871,441.42 = 345,003.66 : x
  2. Step 2: Convert to fraction form
    631,478.80/871,441.42 = 345,003.66/x
  3. Step 3: Cross multiply
    631,478.80x = 871,441.42 × 345,003.66
  4. Step 4: Simplify right side
    631,478.80x = 300,650,479,375.60
  5. Step 5: Solve for x
    x = 300,650,479,375.60/631,478.80
  6. Step 6: Final answer
    x = 476,105.42

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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.