Home / 405,816.87-608,719.14-139,579.71

Finding the Fourth Proportional to 405,816.87, 608,719.14 and 139,579.71

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Solution

The fourth proportional to 405,816.87, 608,719.14 and 139,579.71 is: 209,367.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,816.87 : 608,719.14 = 139,579.71 : x
  2. Step 2: Convert to fraction form
    405,816.87/608,719.14 = 139,579.71/x
  3. Step 3: Cross multiply
    405,816.87x = 608,719.14 × 139,579.71
  4. Step 4: Simplify right side
    405,816.87x = 84,964,841,032.65
  5. Step 5: Solve for x
    x = 84,964,841,032.65/405,816.87
  6. Step 6: Final answer
    x = 209,367.44

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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.