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Finding the Fourth Proportional to 495.72, 683.91 and 397.44

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Solution

The fourth proportional to 495.72, 683.91 and 397.44 is: 548.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.72 : 683.91 = 397.44 : x
  2. Step 2: Convert to fraction form
    495.72/683.91 = 397.44/x
  3. Step 3: Cross multiply
    495.72x = 683.91 × 397.44
  4. Step 4: Simplify right side
    495.72x = 271,813.19
  5. Step 5: Solve for x
    x = 271,813.19/495.72
  6. Step 6: Final answer
    x = 548.32

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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.