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Finding the Fourth Proportional to 676.24, 1,013.72 and 329.18

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Solution

The fourth proportional to 676.24, 1,013.72 and 329.18 is: 493.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.24 : 1,013.72 = 329.18 : x
  2. Step 2: Convert to fraction form
    676.24/1,013.72 = 329.18/x
  3. Step 3: Cross multiply
    676.24x = 1,013.72 × 329.18
  4. Step 4: Simplify right side
    676.24x = 333,696.35
  5. Step 5: Solve for x
    x = 333,696.35/676.24
  6. Step 6: Final answer
    x = 493.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.