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Finding the Fourth Proportional to 290,808.87, 436,212.65 and 91,144.47

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Solution

The fourth proportional to 290,808.87, 436,212.65 and 91,144.47 is: 136,716.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,808.87 : 436,212.65 = 91,144.47 : x
  2. Step 2: Convert to fraction form
    290,808.87/436,212.65 = 91,144.47/x
  3. Step 3: Cross multiply
    290,808.87x = 436,212.65 × 91,144.47
  4. Step 4: Simplify right side
    290,808.87x = 39,758,370,335.82
  5. Step 5: Solve for x
    x = 39,758,370,335.82/290,808.87
  6. Step 6: Final answer
    x = 136,716.50

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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.