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Finding the Fourth Proportional to 263,608.40, 395,412.60 and 76,638.80

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Solution

The fourth proportional to 263,608.40, 395,412.60 and 76,638.80 is: 114,958.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,608.40 : 395,412.60 = 76,638.80 : x
  2. Step 2: Convert to fraction form
    263,608.40/395,412.60 = 76,638.80/x
  3. Step 3: Cross multiply
    263,608.40x = 395,412.60 × 76,638.80
  4. Step 4: Simplify right side
    263,608.40x = 30,303,947,168.88
  5. Step 5: Solve for x
    x = 30,303,947,168.88/263,608.40
  6. Step 6: Final answer
    x = 114,958.20

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1.5x scale

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.