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Finding the Fourth Proportional to 305,108.62, 421,247.53 and 196,261.63

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Solution

The fourth proportional to 305,108.62, 421,247.53 and 196,261.63 is: 270,968.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,108.62 : 421,247.53 = 196,261.63 : x
  2. Step 2: Convert to fraction form
    305,108.62/421,247.53 = 196,261.63/x
  3. Step 3: Cross multiply
    305,108.62x = 421,247.53 × 196,261.63
  4. Step 4: Simplify right side
    305,108.62x = 82,674,726,380.62
  5. Step 5: Solve for x
    x = 82,674,726,380.62/305,108.62
  6. Step 6: Final answer
    x = 270,968.18

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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.