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Finding the Fourth Proportional to 383,889.99, 529,938.08 and 247,990.21

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Solution

The fourth proportional to 383,889.99, 529,938.08 and 247,990.21 is: 342,336.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,889.99 : 529,938.08 = 247,990.21 : x
  2. Step 2: Convert to fraction form
    383,889.99/529,938.08 = 247,990.21/x
  3. Step 3: Cross multiply
    383,889.99x = 529,938.08 × 247,990.21
  4. Step 4: Simplify right side
    383,889.99x = 131,419,455,746.20
  5. Step 5: Solve for x
    x = 131,419,455,746.20/383,889.99
  6. Step 6: Final answer
    x = 342,336.24

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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.