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Finding the Fourth Proportional to 354.32, 488.94 and 199.08

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Solution

The fourth proportional to 354.32, 488.94 and 199.08 is: 274.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.32 : 488.94 = 199.08 : x
  2. Step 2: Convert to fraction form
    354.32/488.94 = 199.08/x
  3. Step 3: Cross multiply
    354.32x = 488.94 × 199.08
  4. Step 4: Simplify right side
    354.32x = 97,338.18
  5. Step 5: Solve for x
    x = 97,338.18/354.32
  6. Step 6: Final answer
    x = 274.72

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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.