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Finding the Fourth Proportional to 290.54, 400.76 and 185.45

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Solution

The fourth proportional to 290.54, 400.76 and 185.45 is: 255.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.54 : 400.76 = 185.45 : x
  2. Step 2: Convert to fraction form
    290.54/400.76 = 185.45/x
  3. Step 3: Cross multiply
    290.54x = 400.76 × 185.45
  4. Step 4: Simplify right side
    290.54x = 74,318.01
  5. Step 5: Solve for x
    x = 74,318.01/290.54
  6. Step 6: Final answer
    x = 255.80

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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.