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Finding the Fourth Proportional to 346.36, 477.92 and 198.98

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Solution

The fourth proportional to 346.36, 477.92 and 198.98 is: 274.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.36 : 477.92 = 198.98 : x
  2. Step 2: Convert to fraction form
    346.36/477.92 = 198.98/x
  3. Step 3: Cross multiply
    346.36x = 477.92 × 198.98
  4. Step 4: Simplify right side
    346.36x = 95,096.52
  5. Step 5: Solve for x
    x = 95,096.52/346.36
  6. Step 6: Final answer
    x = 274.56

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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.