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Finding the Fourth Proportional to 290,872.89, 436,318.88 and 80,493.21

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Solution

The fourth proportional to 290,872.89, 436,318.88 and 80,493.21 is: 120,742.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,872.89 : 436,318.88 = 80,493.21 : x
  2. Step 2: Convert to fraction form
    290,872.89/436,318.88 = 80,493.21/x
  3. Step 3: Cross multiply
    290,872.89x = 436,318.88 × 80,493.21
  4. Step 4: Simplify right side
    290,872.89x = 35,120,706,832.34
  5. Step 5: Solve for x
    x = 35,120,706,832.34/290,872.89
  6. Step 6: Final answer
    x = 120,742.46

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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.