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Finding the Fourth Proportional to 305,336.75, 421,415.15 and 169,414.43

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Solution

The fourth proportional to 305,336.75, 421,415.15 and 169,414.43 is: 233,819.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,336.75 : 421,415.15 = 169,414.43 : x
  2. Step 2: Convert to fraction form
    305,336.75/421,415.15 = 169,414.43/x
  3. Step 3: Cross multiply
    305,336.75x = 421,415.15 × 169,414.43
  4. Step 4: Simplify right side
    305,336.75x = 71,393,804,476.47
  5. Step 5: Solve for x
    x = 71,393,804,476.47/305,336.75
  6. Step 6: Final answer
    x = 233,819.89

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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.