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Finding the Fourth Proportional to 383,536.80, 529,405.20 and 256,240.80

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Solution

The fourth proportional to 383,536.80, 529,405.20 and 256,240.80 is: 353,695.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,536.80 : 529,405.20 = 256,240.80 : x
  2. Step 2: Convert to fraction form
    383,536.80/529,405.20 = 256,240.80/x
  3. Step 3: Cross multiply
    383,536.80x = 529,405.20 × 256,240.80
  4. Step 4: Simplify right side
    383,536.80x = 135,655,211,972.16
  5. Step 5: Solve for x
    x = 135,655,211,972.16/383,536.80
  6. Step 6: Final answer
    x = 353,695.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.