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Finding the Fourth Proportional to 386.82, 581.15 and 359.48

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Solution

The fourth proportional to 386.82, 581.15 and 359.48 is: 540.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.82 : 581.15 = 359.48 : x
  2. Step 2: Convert to fraction form
    386.82/581.15 = 359.48/x
  3. Step 3: Cross multiply
    386.82x = 581.15 × 359.48
  4. Step 4: Simplify right side
    386.82x = 208,914.15
  5. Step 5: Solve for x
    x = 208,914.15/386.82
  6. Step 6: Final answer
    x = 540.08

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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.