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Finding the Fourth Proportional to 290.74, 401.54 and 192.94

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Solution

The fourth proportional to 290.74, 401.54 and 192.94 is: 266.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.74 : 401.54 = 192.94 : x
  2. Step 2: Convert to fraction form
    290.74/401.54 = 192.94/x
  3. Step 3: Cross multiply
    290.74x = 401.54 × 192.94
  4. Step 4: Simplify right side
    290.74x = 77,473.13
  5. Step 5: Solve for x
    x = 77,473.13/290.74
  6. Step 6: Final answer
    x = 266.47

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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.