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Finding the Fourth Proportional to 2,289.89, 3,434.84 and 828.71

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Solution

The fourth proportional to 2,289.89, 3,434.84 and 828.71 is: 1,243.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,289.89 : 3,434.84 = 828.71 : x
  2. Step 2: Convert to fraction form
    2,289.89/3,434.84 = 828.71/x
  3. Step 3: Cross multiply
    2,289.89x = 3,434.84 × 828.71
  4. Step 4: Simplify right side
    2,289.89x = 2,846,471.15
  5. Step 5: Solve for x
    x = 2,846,471.15/2,289.89
  6. Step 6: Final answer
    x = 1,243.06

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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.