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Finding the Fourth Proportional to 631,585.86, 871,562.79 and 345,115.86

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Solution

The fourth proportional to 631,585.86, 871,562.79 and 345,115.86 is: 476,245.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,585.86 : 871,562.79 = 345,115.86 : x
  2. Step 2: Convert to fraction form
    631,585.86/871,562.79 = 345,115.86/x
  3. Step 3: Cross multiply
    631,585.86x = 871,562.79 × 345,115.86
  4. Step 4: Simplify right side
    631,585.86x = 300,790,141,814.85
  5. Step 5: Solve for x
    x = 300,790,141,814.85/631,585.86
  6. Step 6: Final answer
    x = 476,245.85

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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.