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Finding the Fourth Proportional to 290.79, 401.27 and 208.03

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Solution

The fourth proportional to 290.79, 401.27 and 208.03 is: 287.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.79 : 401.27 = 208.03 : x
  2. Step 2: Convert to fraction form
    290.79/401.27 = 208.03/x
  3. Step 3: Cross multiply
    290.79x = 401.27 × 208.03
  4. Step 4: Simplify right side
    290.79x = 83,476.72
  5. Step 5: Solve for x
    x = 83,476.72/290.79
  6. Step 6: Final answer
    x = 287.07

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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.