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Finding the Fourth Proportional to 290,834.55, 436,261.55 and 80,454.87

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Solution

The fourth proportional to 290,834.55, 436,261.55 and 80,454.87 is: 120,684.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,834.55 : 436,261.55 = 80,454.87 : x
  2. Step 2: Convert to fraction form
    290,834.55/436,261.55 = 80,454.87/x
  3. Step 3: Cross multiply
    290,834.55x = 436,261.55 × 80,454.87
  4. Step 4: Simplify right side
    290,834.55x = 35,099,365,888.97
  5. Step 5: Solve for x
    x = 35,099,365,888.97/290,834.55
  6. Step 6: Final answer
    x = 120,684.99

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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.