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Finding the Fourth Proportional to 290,976.94, 436,465.95 and 80,615.44

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Solution

The fourth proportional to 290,976.94, 436,465.95 and 80,615.44 is: 120,923.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,976.94 : 436,465.95 = 80,615.44 : x
  2. Step 2: Convert to fraction form
    290,976.94/436,465.95 = 80,615.44/x
  3. Step 3: Cross multiply
    290,976.94x = 436,465.95 × 80,615.44
  4. Step 4: Simplify right side
    290,976.94x = 35,185,894,604.27
  5. Step 5: Solve for x
    x = 35,185,894,604.27/290,976.94
  6. Step 6: Final answer
    x = 120,923.31

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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.