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Finding the Fourth Proportional to 484.30, 668.38 and 274.51

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Solution

The fourth proportional to 484.30, 668.38 and 274.51 is: 378.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.30 : 668.38 = 274.51 : x
  2. Step 2: Convert to fraction form
    484.30/668.38 = 274.51/x
  3. Step 3: Cross multiply
    484.30x = 668.38 × 274.51
  4. Step 4: Simplify right side
    484.30x = 183,476.99
  5. Step 5: Solve for x
    x = 183,476.99/484.30
  6. Step 6: Final answer
    x = 378.85

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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.