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Finding the Fourth Proportional to 567.99, 851.43 and 221.05

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Solution

The fourth proportional to 567.99, 851.43 and 221.05 is: 331.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    567.99 : 851.43 = 221.05 : x
  2. Step 2: Convert to fraction form
    567.99/851.43 = 221.05/x
  3. Step 3: Cross multiply
    567.99x = 851.43 × 221.05
  4. Step 4: Simplify right side
    567.99x = 188,208.60
  5. Step 5: Solve for x
    x = 188,208.60/567.99
  6. Step 6: Final answer
    x = 331.36

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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.