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Finding the Fourth Proportional to 355,103.33, 490,219.38 and 219,212.21

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Solution

The fourth proportional to 355,103.33, 490,219.38 and 219,212.21 is: 302,621.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,103.33 : 490,219.38 = 219,212.21 : x
  2. Step 2: Convert to fraction form
    355,103.33/490,219.38 = 219,212.21/x
  3. Step 3: Cross multiply
    355,103.33x = 490,219.38 × 219,212.21
  4. Step 4: Simplify right side
    355,103.33x = 107,462,073,902.54
  5. Step 5: Solve for x
    x = 107,462,073,902.54/355,103.33
  6. Step 6: Final answer
    x = 302,621.98

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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.