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Finding the Fourth Proportional to 495.90, 684.28 and 274.81

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Solution

The fourth proportional to 495.90, 684.28 and 274.81 is: 379.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.90 : 684.28 = 274.81 : x
  2. Step 2: Convert to fraction form
    495.90/684.28 = 274.81/x
  3. Step 3: Cross multiply
    495.90x = 684.28 × 274.81
  4. Step 4: Simplify right side
    495.90x = 188,046.99
  5. Step 5: Solve for x
    x = 188,046.99/495.90
  6. Step 6: Final answer
    x = 379.20

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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.