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Finding the Fourth Proportional to 631,725.54, 871,781.73 and 345,245.67

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Solution

The fourth proportional to 631,725.54, 871,781.73 and 345,245.67 is: 476,439.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,725.54 : 871,781.73 = 345,245.67 : x
  2. Step 2: Convert to fraction form
    631,725.54/871,781.73 = 345,245.67/x
  3. Step 3: Cross multiply
    631,725.54x = 871,781.73 × 345,245.67
  4. Step 4: Simplify right side
    631,725.54x = 300,978,867,467.61
  5. Step 5: Solve for x
    x = 300,978,867,467.61/631,725.54
  6. Step 6: Final answer
    x = 476,439.29

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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.