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Finding the Fourth Proportional to 2,555.75, 3,833.46 and 912.21

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Solution

The fourth proportional to 2,555.75, 3,833.46 and 912.21 is: 1,368.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,555.75 : 3,833.46 = 912.21 : x
  2. Step 2: Convert to fraction form
    2,555.75/3,833.46 = 912.21/x
  3. Step 3: Cross multiply
    2,555.75x = 3,833.46 × 912.21
  4. Step 4: Simplify right side
    2,555.75x = 3,496,920.55
  5. Step 5: Solve for x
    x = 3,496,920.55/2,555.75
  6. Step 6: Final answer
    x = 1,368.26

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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.