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Finding the Fourth Proportional to 255,229.22, 383,080.12 and 128,958.33

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Solution

The fourth proportional to 255,229.22, 383,080.12 and 128,958.33 is: 193,556.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,229.22 : 383,080.12 = 128,958.33 : x
  2. Step 2: Convert to fraction form
    255,229.22/383,080.12 = 128,958.33/x
  3. Step 3: Cross multiply
    255,229.22x = 383,080.12 × 128,958.33
  4. Step 4: Simplify right side
    255,229.22x = 49,401,372,531.40
  5. Step 5: Solve for x
    x = 49,401,372,531.40/255,229.22
  6. Step 6: Final answer
    x = 193,556.88

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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.