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Finding the Fourth Proportional to 305,991.72, 422,471.88 and 191,442.96

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Solution

The fourth proportional to 305,991.72, 422,471.88 and 191,442.96 is: 264,318.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,991.72 : 422,471.88 = 191,442.96 : x
  2. Step 2: Convert to fraction form
    305,991.72/422,471.88 = 191,442.96/x
  3. Step 3: Cross multiply
    305,991.72x = 422,471.88 × 191,442.96
  4. Step 4: Simplify right side
    305,991.72x = 80,879,267,223.96
  5. Step 5: Solve for x
    x = 80,879,267,223.96/305,991.72
  6. Step 6: Final answer
    x = 264,318.48

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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.