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Finding the Fourth Proportional to 318,902.40, 478,180.80 and 131,932.80

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Solution

The fourth proportional to 318,902.40, 478,180.80 and 131,932.80 is: 197,827.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,902.40 : 478,180.80 = 131,932.80 : x
  2. Step 2: Convert to fraction form
    318,902.40/478,180.80 = 131,932.80/x
  3. Step 3: Cross multiply
    318,902.40x = 478,180.80 × 131,932.80
  4. Step 4: Simplify right side
    318,902.40x = 63,087,731,850.24
  5. Step 5: Solve for x
    x = 63,087,731,850.24/318,902.40
  6. Step 6: Final answer
    x = 197,827.71

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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.