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Finding the Fourth Proportional to 367,790.40, 551,685.60 and 218,491.20

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Solution

The fourth proportional to 367,790.40, 551,685.60 and 218,491.20 is: 327,736.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    367,790.40 : 551,685.60 = 218,491.20 : x
  2. Step 2: Convert to fraction form
    367,790.40/551,685.60 = 218,491.20/x
  3. Step 3: Cross multiply
    367,790.40x = 551,685.60 × 218,491.20
  4. Step 4: Simplify right side
    367,790.40x = 120,538,448,766.72
  5. Step 5: Solve for x
    x = 120,538,448,766.72/367,790.40
  6. Step 6: Final answer
    x = 327,736.80

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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.