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Finding the Fourth Proportional to 386.25, 581.69 and 351.69

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Solution

The fourth proportional to 386.25, 581.69 and 351.69 is: 529.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.25 : 581.69 = 351.69 : x
  2. Step 2: Convert to fraction form
    386.25/581.69 = 351.69/x
  3. Step 3: Cross multiply
    386.25x = 581.69 × 351.69
  4. Step 4: Simplify right side
    386.25x = 204,573.68
  5. Step 5: Solve for x
    x = 204,573.68/386.25
  6. Step 6: Final answer
    x = 529.64

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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.