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Finding the Fourth Proportional to 290.54, 436.22 and 192.76

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Solution

The fourth proportional to 290.54, 436.22 and 192.76 is: 289.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.54 : 436.22 = 192.76 : x
  2. Step 2: Convert to fraction form
    290.54/436.22 = 192.76/x
  3. Step 3: Cross multiply
    290.54x = 436.22 × 192.76
  4. Step 4: Simplify right side
    290.54x = 84,085.77
  5. Step 5: Solve for x
    x = 84,085.77/290.54
  6. Step 6: Final answer
    x = 289.41

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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.