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Finding the Fourth Proportional to 262,879.20, 394,059.60 and 129,650.40

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Solution

The fourth proportional to 262,879.20, 394,059.60 and 129,650.40 is: 194,347.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,879.20 : 394,059.60 = 129,650.40 : x
  2. Step 2: Convert to fraction form
    262,879.20/394,059.60 = 129,650.40/x
  3. Step 3: Cross multiply
    262,879.20x = 394,059.60 × 129,650.40
  4. Step 4: Simplify right side
    262,879.20x = 51,089,984,763.84
  5. Step 5: Solve for x
    x = 51,089,984,763.84/262,879.20
  6. Step 6: Final answer
    x = 194,347.76

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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.