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Finding the Fourth Proportional to 572.49, 789.21 and 517.41

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Solution

The fourth proportional to 572.49, 789.21 and 517.41 is: 713.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.49 : 789.21 = 517.41 : x
  2. Step 2: Convert to fraction form
    572.49/789.21 = 517.41/x
  3. Step 3: Cross multiply
    572.49x = 789.21 × 517.41
  4. Step 4: Simplify right side
    572.49x = 408,345.15
  5. Step 5: Solve for x
    x = 408,345.15/572.49
  6. Step 6: Final answer
    x = 713.28

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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.