Home / 405,739.40-608,981.10-206,198.60

Finding the Fourth Proportional to 405,739.40, 608,981.10 and 206,198.60

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Solution

The fourth proportional to 405,739.40, 608,981.10 and 206,198.60 is: 309,486.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,739.40 : 608,981.10 = 206,198.60 : x
  2. Step 2: Convert to fraction form
    405,739.40/608,981.10 = 206,198.60/x
  3. Step 3: Cross multiply
    405,739.40x = 608,981.10 × 206,198.60
  4. Step 4: Simplify right side
    405,739.40x = 125,571,050,246.46
  5. Step 5: Solve for x
    x = 125,571,050,246.46/405,739.40
  6. Step 6: Final answer
    x = 309,486.95

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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.