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Finding the Fourth Proportional to 631,771.92, 871,840.26 and 356,104.62

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Solution

The fourth proportional to 631,771.92, 871,840.26 and 356,104.62 is: 491,421.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,771.92 : 871,840.26 = 356,104.62 : x
  2. Step 2: Convert to fraction form
    631,771.92/871,840.26 = 356,104.62/x
  3. Step 3: Cross multiply
    631,771.92x = 871,840.26 × 356,104.62
  4. Step 4: Simplify right side
    631,771.92x = 310,466,344,488.00
  5. Step 5: Solve for x
    x = 310,466,344,488.00/631,771.92
  6. Step 6: Final answer
    x = 491,421.56

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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.