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Finding the Fourth Proportional to 495.21, 683.40 and 298.86

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Solution

The fourth proportional to 495.21, 683.40 and 298.86 is: 412.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.21 : 683.40 = 298.86 : x
  2. Step 2: Convert to fraction form
    495.21/683.40 = 298.86/x
  3. Step 3: Cross multiply
    495.21x = 683.40 × 298.86
  4. Step 4: Simplify right side
    495.21x = 204,240.92
  5. Step 5: Solve for x
    x = 204,240.92/495.21
  6. Step 6: Final answer
    x = 412.43

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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.