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Finding the Fourth Proportional to 290,760.85, 436,149.42 and 80,398.72

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Solution

The fourth proportional to 290,760.85, 436,149.42 and 80,398.72 is: 120,600.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,760.85 : 436,149.42 = 80,398.72 : x
  2. Step 2: Convert to fraction form
    290,760.85/436,149.42 = 80,398.72/x
  3. Step 3: Cross multiply
    290,760.85x = 436,149.42 × 80,398.72
  4. Step 4: Simplify right side
    290,760.85x = 35,065,855,096.74
  5. Step 5: Solve for x
    x = 35,065,855,096.74/290,760.85
  6. Step 6: Final answer
    x = 120,600.33

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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.