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Finding the Fourth Proportional to 386.27, 581.49 and 352.79

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Solution

The fourth proportional to 386.27, 581.49 and 352.79 is: 531.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.27 : 581.49 = 352.79 : x
  2. Step 2: Convert to fraction form
    386.27/581.49 = 352.79/x
  3. Step 3: Cross multiply
    386.27x = 581.49 × 352.79
  4. Step 4: Simplify right side
    386.27x = 205,143.86
  5. Step 5: Solve for x
    x = 205,143.86/386.27
  6. Step 6: Final answer
    x = 531.09

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.