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Finding the Fourth Proportional to 495.92, 684.36 and 309.44

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Solution

The fourth proportional to 495.92, 684.36 and 309.44 is: 427.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.92 : 684.36 = 309.44 : x
  2. Step 2: Convert to fraction form
    495.92/684.36 = 309.44/x
  3. Step 3: Cross multiply
    495.92x = 684.36 × 309.44
  4. Step 4: Simplify right side
    495.92x = 211,764.94
  5. Step 5: Solve for x
    x = 211,764.94/495.92
  6. Step 6: Final answer
    x = 427.02

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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.