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Finding the Fourth Proportional to 1,890.21, 2,836.18 and 850.48

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Solution

The fourth proportional to 1,890.21, 2,836.18 and 850.48 is: 1,276.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,890.21 : 2,836.18 = 850.48 : x
  2. Step 2: Convert to fraction form
    1,890.21/2,836.18 = 850.48/x
  3. Step 3: Cross multiply
    1,890.21x = 2,836.18 × 850.48
  4. Step 4: Simplify right side
    1,890.21x = 2,412,114.37
  5. Step 5: Solve for x
    x = 2,412,114.37/1,890.21
  6. Step 6: Final answer
    x = 1,276.11

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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.