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Finding the Fourth Proportional to 2,074.58, 3,112.96 and 920.06

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Solution

The fourth proportional to 2,074.58, 3,112.96 and 920.06 is: 1,380.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,074.58 : 3,112.96 = 920.06 : x
  2. Step 2: Convert to fraction form
    2,074.58/3,112.96 = 920.06/x
  3. Step 3: Cross multiply
    2,074.58x = 3,112.96 × 920.06
  4. Step 4: Simplify right side
    2,074.58x = 2,864,109.98
  5. Step 5: Solve for x
    x = 2,864,109.98/2,074.58
  6. Step 6: Final answer
    x = 1,380.57

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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.