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Finding the Fourth Proportional to 290,542.19, 400,786.41 and 269,991.98

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Solution

The fourth proportional to 290,542.19, 400,786.41 and 269,991.98 is: 372,438.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,542.19 : 400,786.41 = 269,991.98 : x
  2. Step 2: Convert to fraction form
    290,542.19/400,786.41 = 269,991.98/x
  3. Step 3: Cross multiply
    290,542.19x = 400,786.41 × 269,991.98
  4. Step 4: Simplify right side
    290,542.19x = 108,209,114,389.06
  5. Step 5: Solve for x
    x = 108,209,114,389.06/290,542.19
  6. Step 6: Final answer
    x = 372,438.56

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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.