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Finding the Fourth Proportional to 505,679.64, 697,859.12 and 290,819.88

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Solution

The fourth proportional to 505,679.64, 697,859.12 and 290,819.88 is: 401,343.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,679.64 : 697,859.12 = 290,819.88 : x
  2. Step 2: Convert to fraction form
    505,679.64/697,859.12 = 290,819.88/x
  3. Step 3: Cross multiply
    505,679.64x = 697,859.12 × 290,819.88
  4. Step 4: Simplify right side
    505,679.64x = 202,951,305,535.31
  5. Step 5: Solve for x
    x = 202,951,305,535.31/505,679.64
  6. Step 6: Final answer
    x = 401,343.64

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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.