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Finding the Fourth Proportional to 263,048.80, 394,573.20 and 105,390.40

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Solution

The fourth proportional to 263,048.80, 394,573.20 and 105,390.40 is: 158,085.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,048.80 : 394,573.20 = 105,390.40 : x
  2. Step 2: Convert to fraction form
    263,048.80/394,573.20 = 105,390.40/x
  3. Step 3: Cross multiply
    263,048.80x = 394,573.20 × 105,390.40
  4. Step 4: Simplify right side
    263,048.80x = 41,584,227,377.28
  5. Step 5: Solve for x
    x = 41,584,227,377.28/263,048.80
  6. Step 6: Final answer
    x = 158,085.60

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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.