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Finding the Fourth Proportional to 305,389.62, 421,635.60 and 196,542.72

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Solution

The fourth proportional to 305,389.62, 421,635.60 and 196,542.72 is: 271,356.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,389.62 : 421,635.60 = 196,542.72 : x
  2. Step 2: Convert to fraction form
    305,389.62/421,635.60 = 196,542.72/x
  3. Step 3: Cross multiply
    305,389.62x = 421,635.60 × 196,542.72
  4. Step 4: Simplify right side
    305,389.62x = 82,869,407,672.83
  5. Step 5: Solve for x
    x = 82,869,407,672.83/305,389.62
  6. Step 6: Final answer
    x = 271,356.33

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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.