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Finding the Fourth Proportional to 323,627.20, 485,181.60 and 136,484.80

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Solution

The fourth proportional to 323,627.20, 485,181.60 and 136,484.80 is: 204,617.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,627.20 : 485,181.60 = 136,484.80 : x
  2. Step 2: Convert to fraction form
    323,627.20/485,181.60 = 136,484.80/x
  3. Step 3: Cross multiply
    323,627.20x = 485,181.60 × 136,484.80
  4. Step 4: Simplify right side
    323,627.20x = 66,219,913,639.68
  5. Step 5: Solve for x
    x = 66,219,913,639.68/323,627.20
  6. Step 6: Final answer
    x = 204,617.89

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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.