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Finding the Fourth Proportional to 356.34, 491.76 and 198.97

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Solution

The fourth proportional to 356.34, 491.76 and 198.97 is: 274.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.34 : 491.76 = 198.97 : x
  2. Step 2: Convert to fraction form
    356.34/491.76 = 198.97/x
  3. Step 3: Cross multiply
    356.34x = 491.76 × 198.97
  4. Step 4: Simplify right side
    356.34x = 97,844.26
  5. Step 5: Solve for x
    x = 97,844.26/356.34
  6. Step 6: Final answer
    x = 274.58

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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.