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Finding the Fourth Proportional to 676.70, 933.89 and 381.99

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Solution

The fourth proportional to 676.70, 933.89 and 381.99 is: 527.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.70 : 933.89 = 381.99 : x
  2. Step 2: Convert to fraction form
    676.70/933.89 = 381.99/x
  3. Step 3: Cross multiply
    676.70x = 933.89 × 381.99
  4. Step 4: Simplify right side
    676.70x = 356,734.73
  5. Step 5: Solve for x
    x = 356,734.73/676.70
  6. Step 6: Final answer
    x = 527.17

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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.