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Finding the Fourth Proportional to 290,734.48, 436,100.82 and 80,372.08

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Solution

The fourth proportional to 290,734.48, 436,100.82 and 80,372.08 is: 120,557.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,734.48 : 436,100.82 = 80,372.08 : x
  2. Step 2: Convert to fraction form
    290,734.48/436,100.82 = 80,372.08/x
  3. Step 3: Cross multiply
    290,734.48x = 436,100.82 × 80,372.08
  4. Step 4: Simplify right side
    290,734.48x = 35,050,329,993.11
  5. Step 5: Solve for x
    x = 35,050,329,993.11/290,734.48
  6. Step 6: Final answer
    x = 120,557.87

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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.