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Finding the Fourth Proportional to 2,816, 4,224.08 and 764

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Solution

The fourth proportional to 2,816, 4,224.08 and 764 is: 1,146.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,816 : 4,224.08 = 764 : x
  2. Step 2: Convert to fraction form
    2,816/4,224.08 = 764/x
  3. Step 3: Cross multiply
    2,816x = 4,224.08 × 764
  4. Step 4: Simplify right side
    2,816x = 3,227,197.12
  5. Step 5: Solve for x
    x = 3,227,197.12/2,816
  6. Step 6: Final answer
    x = 1,146.02

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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.