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Finding the Fourth Proportional to 193.76, 290.76 and 139.52

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Solution

The fourth proportional to 193.76, 290.76 and 139.52 is: 209.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    193.76 : 290.76 = 139.52 : x
  2. Step 2: Convert to fraction form
    193.76/290.76 = 139.52/x
  3. Step 3: Cross multiply
    193.76x = 290.76 × 139.52
  4. Step 4: Simplify right side
    193.76x = 40,566.84
  5. Step 5: Solve for x
    x = 40,566.84/193.76
  6. Step 6: Final answer
    x = 209.37

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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.