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Finding the Fourth Proportional to 290.03, 399.89 and 191.66

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Solution

The fourth proportional to 290.03, 399.89 and 191.66 is: 264.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.03 : 399.89 = 191.66 : x
  2. Step 2: Convert to fraction form
    290.03/399.89 = 191.66/x
  3. Step 3: Cross multiply
    290.03x = 399.89 × 191.66
  4. Step 4: Simplify right side
    290.03x = 76,641.40
  5. Step 5: Solve for x
    x = 76,641.40/290.03
  6. Step 6: Final answer
    x = 264.26

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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.