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Finding the Fourth Proportional to 353,065.12, 487,193.45 and 209,797.48

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Solution

The fourth proportional to 353,065.12, 487,193.45 and 209,797.48 is: 289,498.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,065.12 : 487,193.45 = 209,797.48 : x
  2. Step 2: Convert to fraction form
    353,065.12/487,193.45 = 209,797.48/x
  3. Step 3: Cross multiply
    353,065.12x = 487,193.45 × 209,797.48
  4. Step 4: Simplify right side
    353,065.12x = 102,211,958,082.51
  5. Step 5: Solve for x
    x = 102,211,958,082.51/353,065.12
  6. Step 6: Final answer
    x = 289,498.88

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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.