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Finding the Fourth Proportional to 291,287.07, 436,936.08 and 80,930.49

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Solution

The fourth proportional to 291,287.07, 436,936.08 and 80,930.49 is: 121,397.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,287.07 : 436,936.08 = 80,930.49 : x
  2. Step 2: Convert to fraction form
    291,287.07/436,936.08 = 80,930.49/x
  3. Step 3: Cross multiply
    291,287.07x = 436,936.08 × 80,930.49
  4. Step 4: Simplify right side
    291,287.07x = 35,361,451,053.08
  5. Step 5: Solve for x
    x = 35,361,451,053.08/291,287.07
  6. Step 6: Final answer
    x = 121,397.26

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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.