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Finding the Fourth Proportional to 346.13, 477.64 and 198.73

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Solution

The fourth proportional to 346.13, 477.64 and 198.73 is: 274.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.13 : 477.64 = 198.73 : x
  2. Step 2: Convert to fraction form
    346.13/477.64 = 198.73/x
  3. Step 3: Cross multiply
    346.13x = 477.64 × 198.73
  4. Step 4: Simplify right side
    346.13x = 94,921.40
  5. Step 5: Solve for x
    x = 94,921.40/346.13
  6. Step 6: Final answer
    x = 274.24

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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.