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Finding the Fourth Proportional to 305,343.32, 421,380.54 and 169,372.85

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Solution

The fourth proportional to 305,343.32, 421,380.54 and 169,372.85 is: 233,738.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,343.32 : 421,380.54 = 169,372.85 : x
  2. Step 2: Convert to fraction form
    305,343.32/421,380.54 = 169,372.85/x
  3. Step 3: Cross multiply
    305,343.32x = 421,380.54 × 169,372.85
  4. Step 4: Simplify right side
    305,343.32x = 71,370,420,887.44
  5. Step 5: Solve for x
    x = 71,370,420,887.44/305,343.32
  6. Step 6: Final answer
    x = 233,738.28

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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.