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Finding the Fourth Proportional to 285,961.05, 394,626.60 and 158,636.64

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Solution

The fourth proportional to 285,961.05, 394,626.60 and 158,636.64 is: 218,918.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,961.05 : 394,626.60 = 158,636.64 : x
  2. Step 2: Convert to fraction form
    285,961.05/394,626.60 = 158,636.64/x
  3. Step 3: Cross multiply
    285,961.05x = 394,626.60 × 158,636.64
  4. Step 4: Simplify right side
    285,961.05x = 62,602,237,878.62
  5. Step 5: Solve for x
    x = 62,602,237,878.62/285,961.05
  6. Step 6: Final answer
    x = 218,918.76

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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.