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Finding the Fourth Proportional to 318,231.76, 477,308.76 and 131,218.96

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Solution

The fourth proportional to 318,231.76, 477,308.76 and 131,218.96 is: 196,812.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,231.76 : 477,308.76 = 131,218.96 : x
  2. Step 2: Convert to fraction form
    318,231.76/477,308.76 = 131,218.96/x
  3. Step 3: Cross multiply
    318,231.76x = 477,308.76 × 131,218.96
  4. Step 4: Simplify right side
    318,231.76x = 62,631,959,086.09
  5. Step 5: Solve for x
    x = 62,631,959,086.09/318,231.76
  6. Step 6: Final answer
    x = 196,812.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.