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Finding the Fourth Proportional to 2,763.36, 4,145.31 and 816.12

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Solution

The fourth proportional to 2,763.36, 4,145.31 and 816.12 is: 1,224.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,763.36 : 4,145.31 = 816.12 : x
  2. Step 2: Convert to fraction form
    2,763.36/4,145.31 = 816.12/x
  3. Step 3: Cross multiply
    2,763.36x = 4,145.31 × 816.12
  4. Step 4: Simplify right side
    2,763.36x = 3,383,070.40
  5. Step 5: Solve for x
    x = 3,383,070.40/2,763.36
  6. Step 6: Final answer
    x = 1,224.26

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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.