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Finding the Fourth Proportional to 776.48, 1,163.66 and 289.06

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Solution

The fourth proportional to 776.48, 1,163.66 and 289.06 is: 433.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    776.48 : 1,163.66 = 289.06 : x
  2. Step 2: Convert to fraction form
    776.48/1,163.66 = 289.06/x
  3. Step 3: Cross multiply
    776.48x = 1,163.66 × 289.06
  4. Step 4: Simplify right side
    776.48x = 336,367.56
  5. Step 5: Solve for x
    x = 336,367.56/776.48
  6. Step 6: Final answer
    x = 433.20

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.