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Finding the Fourth Proportional to 409,813.20, 614,719.80 and 344,859.30

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Solution

The fourth proportional to 409,813.20, 614,719.80 and 344,859.30 is: 517,288.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,813.20 : 614,719.80 = 344,859.30 : x
  2. Step 2: Convert to fraction form
    409,813.20/614,719.80 = 344,859.30/x
  3. Step 3: Cross multiply
    409,813.20x = 614,719.80 × 344,859.30
  4. Step 4: Simplify right side
    409,813.20x = 211,991,839,924.14
  5. Step 5: Solve for x
    x = 211,991,839,924.14/409,813.20
  6. Step 6: Final answer
    x = 517,288.95

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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.