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Finding the Fourth Proportional to 305,991.99, 422,137.96 and 191,071.12

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Solution

The fourth proportional to 305,991.99, 422,137.96 and 191,071.12 is: 263,596.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,991.99 : 422,137.96 = 191,071.12 : x
  2. Step 2: Convert to fraction form
    305,991.99/422,137.96 = 191,071.12/x
  3. Step 3: Cross multiply
    305,991.99x = 422,137.96 × 191,071.12
  4. Step 4: Simplify right side
    305,991.99x = 80,658,369,745.67
  5. Step 5: Solve for x
    x = 80,658,369,745.67/305,991.99
  6. Step 6: Final answer
    x = 263,596.35

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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.