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Finding the Fourth Proportional to 1,890.51, 2,834.88 and 720.73

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Solution

The fourth proportional to 1,890.51, 2,834.88 and 720.73 is: 1,080.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,890.51 : 2,834.88 = 720.73 : x
  2. Step 2: Convert to fraction form
    1,890.51/2,834.88 = 720.73/x
  3. Step 3: Cross multiply
    1,890.51x = 2,834.88 × 720.73
  4. Step 4: Simplify right side
    1,890.51x = 2,043,183.06
  5. Step 5: Solve for x
    x = 2,043,183.06/1,890.51
  6. Step 6: Final answer
    x = 1,080.76

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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.