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Finding the Fourth Proportional to 776.85, 1,163.61 and 484.44

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Solution

The fourth proportional to 776.85, 1,163.61 and 484.44 is: 725.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    776.85 : 1,163.61 = 484.44 : x
  2. Step 2: Convert to fraction form
    776.85/1,163.61 = 484.44/x
  3. Step 3: Cross multiply
    776.85x = 1,163.61 × 484.44
  4. Step 4: Simplify right side
    776.85x = 563,699.23
  5. Step 5: Solve for x
    x = 563,699.23/776.85
  6. Step 6: Final answer
    x = 725.62

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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.