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Finding the Fourth Proportional to 394,039.40, 591,059.10 and 228,151.40

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Solution

The fourth proportional to 394,039.40, 591,059.10 and 228,151.40 is: 342,227.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,039.40 : 591,059.10 = 228,151.40 : x
  2. Step 2: Convert to fraction form
    394,039.40/591,059.10 = 228,151.40/x
  3. Step 3: Cross multiply
    394,039.40x = 591,059.10 × 228,151.40
  4. Step 4: Simplify right side
    394,039.40x = 134,850,961,147.74
  5. Step 5: Solve for x
    x = 134,850,961,147.74/394,039.40
  6. Step 6: Final answer
    x = 342,227.10

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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.