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Finding the Fourth Proportional to 305,375.72, 421,142.40 and 190,664.73

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Solution

The fourth proportional to 305,375.72, 421,142.40 and 190,664.73 is: 262,944.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,375.72 : 421,142.40 = 190,664.73 : x
  2. Step 2: Convert to fraction form
    305,375.72/421,142.40 = 190,664.73/x
  3. Step 3: Cross multiply
    305,375.72x = 421,142.40 × 190,664.73
  4. Step 4: Simplify right side
    305,375.72x = 80,297,001,987.55
  5. Step 5: Solve for x
    x = 80,297,001,987.55/305,375.72
  6. Step 6: Final answer
    x = 262,944.95

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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.