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Finding the Fourth Proportional to 776.01, 1,163.98 and 228.21

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Solution

The fourth proportional to 776.01, 1,163.98 and 228.21 is: 342.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    776.01 : 1,163.98 = 228.21 : x
  2. Step 2: Convert to fraction form
    776.01/1,163.98 = 228.21/x
  3. Step 3: Cross multiply
    776.01x = 1,163.98 × 228.21
  4. Step 4: Simplify right side
    776.01x = 265,631.88
  5. Step 5: Solve for x
    x = 265,631.88/776.01
  6. Step 6: Final answer
    x = 342.30

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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.