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Finding the Fourth Proportional to 219,979.78, 303,415.22 and 201,888.79

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Solution

The fourth proportional to 219,979.78, 303,415.22 and 201,888.79 is: 278,462.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,979.78 : 303,415.22 = 201,888.79 : x
  2. Step 2: Convert to fraction form
    219,979.78/303,415.22 = 201,888.79/x
  3. Step 3: Cross multiply
    219,979.78x = 303,415.22 × 201,888.79
  4. Step 4: Simplify right side
    219,979.78x = 61,256,131,379.57
  5. Step 5: Solve for x
    x = 61,256,131,379.57/219,979.78
  6. Step 6: Final answer
    x = 278,462.56

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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.