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Finding the Fourth Proportional to 290,849.58, 436,284.12 and 80,469.90

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Solution

The fourth proportional to 290,849.58, 436,284.12 and 80,469.90 is: 120,707.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,849.58 : 436,284.12 = 80,469.90 : x
  2. Step 2: Convert to fraction form
    290,849.58/436,284.12 = 80,469.90/x
  3. Step 3: Cross multiply
    290,849.58x = 436,284.12 × 80,469.90
  4. Step 4: Simplify right side
    290,849.58x = 35,107,739,507.99
  5. Step 5: Solve for x
    x = 35,107,739,507.99/290,849.58
  6. Step 6: Final answer
    x = 120,707.55

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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.