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Finding the Fourth Proportional to 305,685, 421,884.18 and 171,549

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Solution

The fourth proportional to 305,685, 421,884.18 and 171,549 is: 236,759.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,685 : 421,884.18 = 171,549 : x
  2. Step 2: Convert to fraction form
    305,685/421,884.18 = 171,549/x
  3. Step 3: Cross multiply
    305,685x = 421,884.18 × 171,549
  4. Step 4: Simplify right side
    305,685x = 72,373,809,194.82
  5. Step 5: Solve for x
    x = 72,373,809,194.82/305,685
  6. Step 6: Final answer
    x = 236,759.44

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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.