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Finding the Fourth Proportional to 318,874.46, 478,370.54 and 131,900.54

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Solution

The fourth proportional to 318,874.46, 478,370.54 and 131,900.54 is: 197,875.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,874.46 : 478,370.54 = 131,900.54 : x
  2. Step 2: Convert to fraction form
    318,874.46/478,370.54 = 131,900.54/x
  3. Step 3: Cross multiply
    318,874.46x = 478,370.54 × 131,900.54
  4. Step 4: Simplify right side
    318,874.46x = 63,097,330,483.99
  5. Step 5: Solve for x
    x = 63,097,330,483.99/318,874.46
  6. Step 6: Final answer
    x = 197,875.15

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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.