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Finding the Fourth Proportional to 355,191, 490,163.58 and 196,215

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Solution

The fourth proportional to 355,191, 490,163.58 and 196,215 is: 270,776.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,191 : 490,163.58 = 196,215 : x
  2. Step 2: Convert to fraction form
    355,191/490,163.58 = 196,215/x
  3. Step 3: Cross multiply
    355,191x = 490,163.58 × 196,215
  4. Step 4: Simplify right side
    355,191x = 96,177,446,849.70
  5. Step 5: Solve for x
    x = 96,177,446,849.70/355,191
  6. Step 6: Final answer
    x = 270,776.70

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1.5x scale

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.