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Finding the Fourth Proportional to 355,791.42, 490,990.41 and 194,643.54

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Solution

The fourth proportional to 355,791.42, 490,990.41 and 194,643.54 is: 268,607.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,791.42 : 490,990.41 = 194,643.54 : x
  2. Step 2: Convert to fraction form
    355,791.42/490,990.41 = 194,643.54/x
  3. Step 3: Cross multiply
    355,791.42x = 490,990.41 × 194,643.54
  4. Step 4: Simplify right side
    355,791.42x = 95,568,111,508.45
  5. Step 5: Solve for x
    x = 95,568,111,508.45/355,791.42
  6. Step 6: Final answer
    x = 268,607.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.