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Finding the Fourth Proportional to 608,309.43, 839,187.99 and 393,518.76

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Solution

The fourth proportional to 608,309.43, 839,187.99 and 393,518.76 is: 542,875.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,309.43 : 839,187.99 = 393,518.76 : x
  2. Step 2: Convert to fraction form
    608,309.43/839,187.99 = 393,518.76/x
  3. Step 3: Cross multiply
    608,309.43x = 839,187.99 × 393,518.76
  4. Step 4: Simplify right side
    608,309.43x = 330,236,217,231.69
  5. Step 5: Solve for x
    x = 330,236,217,231.69/608,309.43
  6. Step 6: Final answer
    x = 542,875.39

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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.