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Finding the Fourth Proportional to 2,811.03, 4,215.80 and 836.12

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Solution

The fourth proportional to 2,811.03, 4,215.80 and 836.12 is: 1,253.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.03 : 4,215.80 = 836.12 : x
  2. Step 2: Convert to fraction form
    2,811.03/4,215.80 = 836.12/x
  3. Step 3: Cross multiply
    2,811.03x = 4,215.80 × 836.12
  4. Step 4: Simplify right side
    2,811.03x = 3,524,927.33
  5. Step 5: Solve for x
    x = 3,524,927.33/2,811.03
  6. Step 6: Final answer
    x = 1,253.97

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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.