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Finding the Fourth Proportional to 386.51, 578.96 and 277.97

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Solution

The fourth proportional to 386.51, 578.96 and 277.97 is: 416.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.51 : 578.96 = 277.97 : x
  2. Step 2: Convert to fraction form
    386.51/578.96 = 277.97/x
  3. Step 3: Cross multiply
    386.51x = 578.96 × 277.97
  4. Step 4: Simplify right side
    386.51x = 160,933.57
  5. Step 5: Solve for x
    x = 160,933.57/386.51
  6. Step 6: Final answer
    x = 416.37

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.