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Finding the Fourth Proportional to 290,713.59, 436,057.97 and 91,029.56

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Solution

The fourth proportional to 290,713.59, 436,057.97 and 91,029.56 is: 136,540.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,713.59 : 436,057.97 = 91,029.56 : x
  2. Step 2: Convert to fraction form
    290,713.59/436,057.97 = 91,029.56/x
  3. Step 3: Cross multiply
    290,713.59x = 436,057.97 × 91,029.56
  4. Step 4: Simplify right side
    290,713.59x = 39,694,162,508.16
  5. Step 5: Solve for x
    x = 39,694,162,508.16/290,713.59
  6. Step 6: Final answer
    x = 136,540.44

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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.