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Finding the Fourth Proportional to 290,917.20, 436,145.40 and 159,589.20

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Solution

The fourth proportional to 290,917.20, 436,145.40 and 159,589.20 is: 239,257.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,917.20 : 436,145.40 = 159,589.20 : x
  2. Step 2: Convert to fraction form
    290,917.20/436,145.40 = 159,589.20/x
  3. Step 3: Cross multiply
    290,917.20x = 436,145.40 × 159,589.20
  4. Step 4: Simplify right side
    290,917.20x = 69,604,095,469.68
  5. Step 5: Solve for x
    x = 69,604,095,469.68/290,917.20
  6. Step 6: Final answer
    x = 239,257.41

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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.