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Finding the Fourth Proportional to 291,243.20, 436,519.20 and 122,763.20

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Solution

The fourth proportional to 291,243.20, 436,519.20 and 122,763.20 is: 183,999.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,243.20 : 436,519.20 = 122,763.20 : x
  2. Step 2: Convert to fraction form
    291,243.20/436,519.20 = 122,763.20/x
  3. Step 3: Cross multiply
    291,243.20x = 436,519.20 × 122,763.20
  4. Step 4: Simplify right side
    291,243.20x = 53,588,493,853.44
  5. Step 5: Solve for x
    x = 53,588,493,853.44/291,243.20
  6. Step 6: Final answer
    x = 183,999.12

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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.