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Finding the Fourth Proportional to 290,842.62, 436,263.94 and 80,480.56

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Solution

The fourth proportional to 290,842.62, 436,263.94 and 80,480.56 is: 120,720.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,842.62 : 436,263.94 = 80,480.56 : x
  2. Step 2: Convert to fraction form
    290,842.62/436,263.94 = 80,480.56/x
  3. Step 3: Cross multiply
    290,842.62x = 436,263.94 × 80,480.56
  4. Step 4: Simplify right side
    290,842.62x = 35,110,766,199.01
  5. Step 5: Solve for x
    x = 35,110,766,199.01/290,842.62
  6. Step 6: Final answer
    x = 120,720.84

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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.