Home / 263,685.72-395,199.60-128,638.44

Finding the Fourth Proportional to 263,685.72, 395,199.60 and 128,638.44

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Solution

The fourth proportional to 263,685.72, 395,199.60 and 128,638.44 is: 192,797.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,685.72 : 395,199.60 = 128,638.44 : x
  2. Step 2: Convert to fraction form
    263,685.72/395,199.60 = 128,638.44/x
  3. Step 3: Cross multiply
    263,685.72x = 395,199.60 × 128,638.44
  4. Step 4: Simplify right side
    263,685.72x = 50,837,860,032.62
  5. Step 5: Solve for x
    x = 50,837,860,032.62/263,685.72
  6. Step 6: Final answer
    x = 192,797.17

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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.