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Finding the Fourth Proportional to 353,230.54, 487,286.75 and 209,889.09

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Solution

The fourth proportional to 353,230.54, 487,286.75 and 209,889.09 is: 289,545.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,230.54 : 487,286.75 = 209,889.09 : x
  2. Step 2: Convert to fraction form
    353,230.54/487,286.75 = 209,889.09/x
  3. Step 3: Cross multiply
    353,230.54x = 487,286.75 × 209,889.09
  4. Step 4: Simplify right side
    353,230.54x = 102,276,173,051.28
  5. Step 5: Solve for x
    x = 102,276,173,051.28/353,230.54
  6. Step 6: Final answer
    x = 289,545.10

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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.