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Finding the Fourth Proportional to 571.62, 789.21 and 375.47

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Solution

The fourth proportional to 571.62, 789.21 and 375.47 is: 518.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.62 : 789.21 = 375.47 : x
  2. Step 2: Convert to fraction form
    571.62/789.21 = 375.47/x
  3. Step 3: Cross multiply
    571.62x = 789.21 × 375.47
  4. Step 4: Simplify right side
    571.62x = 296,320.73
  5. Step 5: Solve for x
    x = 296,320.73/571.62
  6. Step 6: Final answer
    x = 518.39

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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.