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Finding the Fourth Proportional to 567.78, 851.50 and 221.01

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Solution

The fourth proportional to 567.78, 851.50 and 221.01 is: 331.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    567.78 : 851.50 = 221.01 : x
  2. Step 2: Convert to fraction form
    567.78/851.50 = 221.01/x
  3. Step 3: Cross multiply
    567.78x = 851.50 × 221.01
  4. Step 4: Simplify right side
    567.78x = 188,187.10
  5. Step 5: Solve for x
    x = 188,187.10/567.78
  6. Step 6: Final answer
    x = 331.45

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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.