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Finding the Fourth Proportional to 405,870.82, 608,634.95 and 121,601.79

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Solution

The fourth proportional to 405,870.82, 608,634.95 and 121,601.79 is: 182,351.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,870.82 : 608,634.95 = 121,601.79 : x
  2. Step 2: Convert to fraction form
    405,870.82/608,634.95 = 121,601.79/x
  3. Step 3: Cross multiply
    405,870.82x = 608,634.95 × 121,601.79
  4. Step 4: Simplify right side
    405,870.82x = 74,011,099,680.57
  5. Step 5: Solve for x
    x = 74,011,099,680.57/405,870.82
  6. Step 6: Final answer
    x = 182,351.37

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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.