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Finding the Fourth Proportional to 409,891.60, 614,923.80 and 173,112.40

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Solution

The fourth proportional to 409,891.60, 614,923.80 and 173,112.40 is: 259,705.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,891.60 : 614,923.80 = 173,112.40 : x
  2. Step 2: Convert to fraction form
    409,891.60/614,923.80 = 173,112.40/x
  3. Step 3: Cross multiply
    409,891.60x = 614,923.80 × 173,112.40
  4. Step 4: Simplify right side
    409,891.60x = 106,450,934,835.12
  5. Step 5: Solve for x
    x = 106,450,934,835.12/409,891.60
  6. Step 6: Final answer
    x = 259,705.09

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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.