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Finding the Fourth Proportional to 1,789.46, 2,684.38 and 815.44

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Solution

The fourth proportional to 1,789.46, 2,684.38 and 815.44 is: 1,223.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,789.46 : 2,684.38 = 815.44 : x
  2. Step 2: Convert to fraction form
    1,789.46/2,684.38 = 815.44/x
  3. Step 3: Cross multiply
    1,789.46x = 2,684.38 × 815.44
  4. Step 4: Simplify right side
    1,789.46x = 2,188,950.83
  5. Step 5: Solve for x
    x = 2,188,950.83/1,789.46
  6. Step 6: Final answer
    x = 1,223.25

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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.