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Finding the Fourth Proportional to 676.62, 933.72 and 381.90

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Solution

The fourth proportional to 676.62, 933.72 and 381.90 is: 527.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.62 : 933.72 = 381.90 : x
  2. Step 2: Convert to fraction form
    676.62/933.72 = 381.90/x
  3. Step 3: Cross multiply
    676.62x = 933.72 × 381.90
  4. Step 4: Simplify right side
    676.62x = 356,587.67
  5. Step 5: Solve for x
    x = 356,587.67/676.62
  6. Step 6: Final answer
    x = 527.01

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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.