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Finding the Fourth Proportional to 263,445.20, 394,714.20 and 122,915.60

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Solution

The fourth proportional to 263,445.20, 394,714.20 and 122,915.60 is: 184,161.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,445.20 : 394,714.20 = 122,915.60 : x
  2. Step 2: Convert to fraction form
    263,445.20/394,714.20 = 122,915.60/x
  3. Step 3: Cross multiply
    263,445.20x = 394,714.20 × 122,915.60
  4. Step 4: Simplify right side
    263,445.20x = 48,516,532,721.52
  5. Step 5: Solve for x
    x = 48,516,532,721.52/263,445.20
  6. Step 6: Final answer
    x = 184,161.76

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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.