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Finding the Fourth Proportional to 3,112.58, 4,667.46 and 920.54

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Solution

The fourth proportional to 3,112.58, 4,667.46 and 920.54 is: 1,380.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,112.58 : 4,667.46 = 920.54 : x
  2. Step 2: Convert to fraction form
    3,112.58/4,667.46 = 920.54/x
  3. Step 3: Cross multiply
    3,112.58x = 4,667.46 × 920.54
  4. Step 4: Simplify right side
    3,112.58x = 4,296,583.63
  5. Step 5: Solve for x
    x = 4,296,583.63/3,112.58
  6. Step 6: Final answer
    x = 1,380.39

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1.5x scale

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.