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Finding the Fourth Proportional to 398,993.20, 550,607.79 and 226,911.23

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Solution

The fourth proportional to 398,993.20, 550,607.79 and 226,911.23 is: 313,135.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,993.20 : 550,607.79 = 226,911.23 : x
  2. Step 2: Convert to fraction form
    398,993.20/550,607.79 = 226,911.23/x
  3. Step 3: Cross multiply
    398,993.20x = 550,607.79 × 226,911.23
  4. Step 4: Simplify right side
    398,993.20x = 124,939,090,876.48
  5. Step 5: Solve for x
    x = 124,939,090,876.48/398,993.20
  6. Step 6: Final answer
    x = 313,135.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.