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Finding the Fourth Proportional to 572.01, 789.39 and 339

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Solution

The fourth proportional to 572.01, 789.39 and 339 is: 467.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.01 : 789.39 = 339 : x
  2. Step 2: Convert to fraction form
    572.01/789.39 = 339/x
  3. Step 3: Cross multiply
    572.01x = 789.39 × 339
  4. Step 4: Simplify right side
    572.01x = 267,603.21
  5. Step 5: Solve for x
    x = 267,603.21/572.01
  6. Step 6: Final answer
    x = 467.83

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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.