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Finding the Fourth Proportional to 263,329.60, 394,985.52 and 105,515.68

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Solution

The fourth proportional to 263,329.60, 394,985.52 and 105,515.68 is: 158,269.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,329.60 : 394,985.52 = 105,515.68 : x
  2. Step 2: Convert to fraction form
    263,329.60/394,985.52 = 105,515.68/x
  3. Step 3: Cross multiply
    263,329.60x = 394,985.52 × 105,515.68
  4. Step 4: Simplify right side
    263,329.60x = 41,677,165,732.95
  5. Step 5: Solve for x
    x = 41,677,165,732.95/263,329.60
  6. Step 6: Final answer
    x = 158,269.96

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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.