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Finding the Fourth Proportional to 346.98, 479.22 and 274.08

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Solution

The fourth proportional to 346.98, 479.22 and 274.08 is: 378.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.98 : 479.22 = 274.08 : x
  2. Step 2: Convert to fraction form
    346.98/479.22 = 274.08/x
  3. Step 3: Cross multiply
    346.98x = 479.22 × 274.08
  4. Step 4: Simplify right side
    346.98x = 131,344.62
  5. Step 5: Solve for x
    x = 131,344.62/346.98
  6. Step 6: Final answer
    x = 378.54

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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.