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Finding the Fourth Proportional to 405,672.39, 608,352.89 and 139,383.27

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Solution

The fourth proportional to 405,672.39, 608,352.89 and 139,383.27 is: 209,021.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,672.39 : 608,352.89 = 139,383.27 : x
  2. Step 2: Convert to fraction form
    405,672.39/608,352.89 = 139,383.27/x
  3. Step 3: Cross multiply
    405,672.39x = 608,352.89 × 139,383.27
  4. Step 4: Simplify right side
    405,672.39x = 84,794,214,425.23
  5. Step 5: Solve for x
    x = 84,794,214,425.23/405,672.39
  6. Step 6: Final answer
    x = 209,021.41

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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.