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Finding the Fourth Proportional to 263,295.40, 394,943.10 and 145,330.60

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Solution

The fourth proportional to 263,295.40, 394,943.10 and 145,330.60 is: 217,995.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,295.40 : 394,943.10 = 145,330.60 : x
  2. Step 2: Convert to fraction form
    263,295.40/394,943.10 = 145,330.60/x
  3. Step 3: Cross multiply
    263,295.40x = 394,943.10 × 145,330.60
  4. Step 4: Simplify right side
    263,295.40x = 57,397,317,688.86
  5. Step 5: Solve for x
    x = 57,397,317,688.86/263,295.40
  6. Step 6: Final answer
    x = 217,995.90

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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.