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Finding the Fourth Proportional to 290,783.82, 436,175.22 and 91,119.54

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Solution

The fourth proportional to 290,783.82, 436,175.22 and 91,119.54 is: 136,679.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,783.82 : 436,175.22 = 91,119.54 : x
  2. Step 2: Convert to fraction form
    290,783.82/436,175.22 = 91,119.54/x
  3. Step 3: Cross multiply
    290,783.82x = 436,175.22 × 91,119.54
  4. Step 4: Simplify right side
    290,783.82x = 39,744,085,405.80
  5. Step 5: Solve for x
    x = 39,744,085,405.80/290,783.82
  6. Step 6: Final answer
    x = 136,679.15

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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.