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Finding the Fourth Proportional to 290,947.44, 436,421.70 and 80,585.94

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Solution

The fourth proportional to 290,947.44, 436,421.70 and 80,585.94 is: 120,879.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,947.44 : 436,421.70 = 80,585.94 : x
  2. Step 2: Convert to fraction form
    290,947.44/436,421.70 = 80,585.94/x
  3. Step 3: Cross multiply
    290,947.44x = 436,421.70 × 80,585.94
  4. Step 4: Simplify right side
    290,947.44x = 35,169,452,930.90
  5. Step 5: Solve for x
    x = 35,169,452,930.90/290,947.44
  6. Step 6: Final answer
    x = 120,879.06

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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.