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Finding the Fourth Proportional to 572.11, 789.44 and 320.03

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Solution

The fourth proportional to 572.11, 789.44 and 320.03 is: 441.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.11 : 789.44 = 320.03 : x
  2. Step 2: Convert to fraction form
    572.11/789.44 = 320.03/x
  3. Step 3: Cross multiply
    572.11x = 789.44 × 320.03
  4. Step 4: Simplify right side
    572.11x = 252,644.48
  5. Step 5: Solve for x
    x = 252,644.48/572.11
  6. Step 6: Final answer
    x = 441.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.