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Finding the Fourth Proportional to 290,774.38, 436,161.42 and 91,110.46

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Solution

The fourth proportional to 290,774.38, 436,161.42 and 91,110.46 is: 136,665.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,774.38 : 436,161.42 = 91,110.46 : x
  2. Step 2: Convert to fraction form
    290,774.38/436,161.42 = 91,110.46/x
  3. Step 3: Cross multiply
    290,774.38x = 436,161.42 × 91,110.46
  4. Step 4: Simplify right side
    290,774.38x = 39,738,867,610.45
  5. Step 5: Solve for x
    x = 39,738,867,610.45/290,774.38
  6. Step 6: Final answer
    x = 136,665.64

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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.