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Finding the Fourth Proportional to 346.33, 478.05 and 199

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Solution

The fourth proportional to 346.33, 478.05 and 199 is: 274.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.33 : 478.05 = 199 : x
  2. Step 2: Convert to fraction form
    346.33/478.05 = 199/x
  3. Step 3: Cross multiply
    346.33x = 478.05 × 199
  4. Step 4: Simplify right side
    346.33x = 95,131.95
  5. Step 5: Solve for x
    x = 95,131.95/346.33
  6. Step 6: Final answer
    x = 274.69

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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.