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Finding the Fourth Proportional to 591.12, 887.02 and 221.19

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Solution

The fourth proportional to 591.12, 887.02 and 221.19 is: 331.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    591.12 : 887.02 = 221.19 : x
  2. Step 2: Convert to fraction form
    591.12/887.02 = 221.19/x
  3. Step 3: Cross multiply
    591.12x = 887.02 × 221.19
  4. Step 4: Simplify right side
    591.12x = 196,199.95
  5. Step 5: Solve for x
    x = 196,199.95/591.12
  6. Step 6: Final answer
    x = 331.91

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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.