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Finding the Fourth Proportional to 578.82, 799.14 and 379.86

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Solution

The fourth proportional to 578.82, 799.14 and 379.86 is: 524.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.82 : 799.14 = 379.86 : x
  2. Step 2: Convert to fraction form
    578.82/799.14 = 379.86/x
  3. Step 3: Cross multiply
    578.82x = 799.14 × 379.86
  4. Step 4: Simplify right side
    578.82x = 303,561.32
  5. Step 5: Solve for x
    x = 303,561.32/578.82
  6. Step 6: Final answer
    x = 524.45

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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.