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Finding the Fourth Proportional to 405,554.53, 608,325.10 and 121,245.74

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Solution

The fourth proportional to 405,554.53, 608,325.10 and 121,245.74 is: 181,866.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,554.53 : 608,325.10 = 121,245.74 : x
  2. Step 2: Convert to fraction form
    405,554.53/608,325.10 = 121,245.74/x
  3. Step 3: Cross multiply
    405,554.53x = 608,325.10 × 121,245.74
  4. Step 4: Simplify right side
    405,554.53x = 73,756,826,303.85
  5. Step 5: Solve for x
    x = 73,756,826,303.85/405,554.53
  6. Step 6: Final answer
    x = 181,866.61

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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.