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Finding the Fourth Proportional to 3,136.70, 4,705.80 and 945.44

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Solution

The fourth proportional to 3,136.70, 4,705.80 and 945.44 is: 1,418.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,136.70 : 4,705.80 = 945.44 : x
  2. Step 2: Convert to fraction form
    3,136.70/4,705.80 = 945.44/x
  3. Step 3: Cross multiply
    3,136.70x = 4,705.80 × 945.44
  4. Step 4: Simplify right side
    3,136.70x = 4,449,051.55
  5. Step 5: Solve for x
    x = 4,449,051.55/3,136.70
  6. Step 6: Final answer
    x = 1,418.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.