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Finding the Fourth Proportional to 405,339.20, 606,259.20 and 342,353.60

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Solution

The fourth proportional to 405,339.20, 606,259.20 and 342,353.60 is: 512,052.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,339.20 : 606,259.20 = 342,353.60 : x
  2. Step 2: Convert to fraction form
    405,339.20/606,259.20 = 342,353.60/x
  3. Step 3: Cross multiply
    405,339.20x = 606,259.20 × 342,353.60
  4. Step 4: Simplify right side
    405,339.20x = 207,555,019,653.12
  5. Step 5: Solve for x
    x = 207,555,019,653.12/405,339.20
  6. Step 6: Final answer
    x = 512,052.67

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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.