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Finding the Fourth Proportional to 290,889.88, 436,340.22 and 91,205.80

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Solution

The fourth proportional to 290,889.88, 436,340.22 and 91,205.80 is: 136,810.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,889.88 : 436,340.22 = 91,205.80 : x
  2. Step 2: Convert to fraction form
    290,889.88/436,340.22 = 91,205.80/x
  3. Step 3: Cross multiply
    290,889.88x = 436,340.22 × 91,205.80
  4. Step 4: Simplify right side
    290,889.88x = 39,796,758,837.28
  5. Step 5: Solve for x
    x = 39,796,758,837.28/290,889.88
  6. Step 6: Final answer
    x = 136,810.39

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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.