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Finding the Fourth Proportional to 263,010.60, 394,515.90 and 129,911.40

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Solution

The fourth proportional to 263,010.60, 394,515.90 and 129,911.40 is: 194,867.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,010.60 : 394,515.90 = 129,911.40 : x
  2. Step 2: Convert to fraction form
    263,010.60/394,515.90 = 129,911.40/x
  3. Step 3: Cross multiply
    263,010.60x = 394,515.90 × 129,911.40
  4. Step 4: Simplify right side
    263,010.60x = 51,252,112,891.26
  5. Step 5: Solve for x
    x = 51,252,112,891.26/263,010.60
  6. Step 6: Final answer
    x = 194,867.10

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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.