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Finding the Fourth Proportional to 305,695.44, 421,872.88 and 169,729.39

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Solution

The fourth proportional to 305,695.44, 421,872.88 and 169,729.39 is: 234,233.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,695.44 : 421,872.88 = 169,729.39 : x
  2. Step 2: Convert to fraction form
    305,695.44/421,872.88 = 169,729.39/x
  3. Step 3: Cross multiply
    305,695.44x = 421,872.88 × 169,729.39
  4. Step 4: Simplify right side
    305,695.44x = 71,604,226,579.94
  5. Step 5: Solve for x
    x = 71,604,226,579.94/305,695.44
  6. Step 6: Final answer
    x = 234,233.87

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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.