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Finding the Fourth Proportional to 393,119.70, 589,679.55 and 386,558.70

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Solution

The fourth proportional to 393,119.70, 589,679.55 and 386,558.70 is: 579,838.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,119.70 : 589,679.55 = 386,558.70 : x
  2. Step 2: Convert to fraction form
    393,119.70/589,679.55 = 386,558.70/x
  3. Step 3: Cross multiply
    393,119.70x = 589,679.55 × 386,558.70
  4. Step 4: Simplify right side
    393,119.70x = 227,945,760,264.59
  5. Step 5: Solve for x
    x = 227,945,760,264.59/393,119.70
  6. Step 6: Final answer
    x = 579,838.05

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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.