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Finding the Fourth Proportional to 405,000.20, 607,889.10 and 205,545.80

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Solution

The fourth proportional to 405,000.20, 607,889.10 and 205,545.80 is: 308,516.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,000.20 : 607,889.10 = 205,545.80 : x
  2. Step 2: Convert to fraction form
    405,000.20/607,889.10 = 205,545.80/x
  3. Step 3: Cross multiply
    405,000.20x = 607,889.10 × 205,545.80
  4. Step 4: Simplify right side
    405,000.20x = 124,949,051,370.78
  5. Step 5: Solve for x
    x = 124,949,051,370.78/405,000.20
  6. Step 6: Final answer
    x = 308,516.02

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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.