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Finding the Fourth Proportional to 318,898.20, 478,404.90 and 131,928.60

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Solution

The fourth proportional to 318,898.20, 478,404.90 and 131,928.60 is: 197,916.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,898.20 : 478,404.90 = 131,928.60 : x
  2. Step 2: Convert to fraction form
    318,898.20/478,404.90 = 131,928.60/x
  3. Step 3: Cross multiply
    318,898.20x = 478,404.90 × 131,928.60
  4. Step 4: Simplify right side
    318,898.20x = 63,115,288,690.14
  5. Step 5: Solve for x
    x = 63,115,288,690.14/318,898.20
  6. Step 6: Final answer
    x = 197,916.73

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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.