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Finding the Fourth Proportional to 290.23, 400.55 and 185.34

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Solution

The fourth proportional to 290.23, 400.55 and 185.34 is: 255.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.23 : 400.55 = 185.34 : x
  2. Step 2: Convert to fraction form
    290.23/400.55 = 185.34/x
  3. Step 3: Cross multiply
    290.23x = 400.55 × 185.34
  4. Step 4: Simplify right side
    290.23x = 74,236.26
  5. Step 5: Solve for x
    x = 74,236.26/290.23
  6. Step 6: Final answer
    x = 255.78

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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.