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Finding the Fourth Proportional to 495.53, 683.85 and 321.18

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Solution

The fourth proportional to 495.53, 683.85 and 321.18 is: 443.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.53 : 683.85 = 321.18 : x
  2. Step 2: Convert to fraction form
    495.53/683.85 = 321.18/x
  3. Step 3: Cross multiply
    495.53x = 683.85 × 321.18
  4. Step 4: Simplify right side
    495.53x = 219,638.94
  5. Step 5: Solve for x
    x = 219,638.94/495.53
  6. Step 6: Final answer
    x = 443.24

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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.