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Finding the Fourth Proportional to 290,721.60, 436,069.96 and 91,037.56

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Solution

The fourth proportional to 290,721.60, 436,069.96 and 91,037.56 is: 136,552.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,721.60 : 436,069.96 = 91,037.56 : x
  2. Step 2: Convert to fraction form
    290,721.60/436,069.96 = 91,037.56/x
  3. Step 3: Cross multiply
    290,721.60x = 436,069.96 × 91,037.56
  4. Step 4: Simplify right side
    290,721.60x = 39,698,745,147.70
  5. Step 5: Solve for x
    x = 39,698,745,147.70/290,721.60
  6. Step 6: Final answer
    x = 136,552.44

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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.