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Finding the Fourth Proportional to 383,685.86, 529,489.91 and 211,610.48

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Solution

The fourth proportional to 383,685.86, 529,489.91 and 211,610.48 is: 292,024.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,685.86 : 529,489.91 = 211,610.48 : x
  2. Step 2: Convert to fraction form
    383,685.86/529,489.91 = 211,610.48/x
  3. Step 3: Cross multiply
    383,685.86x = 529,489.91 × 211,610.48
  4. Step 4: Simplify right side
    383,685.86x = 112,045,611,891.83
  5. Step 5: Solve for x
    x = 112,045,611,891.83/383,685.86
  6. Step 6: Final answer
    x = 292,024.34

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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.