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Finding the Fourth Proportional to 676.50, 933.50 and 381.80

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Solution

The fourth proportional to 676.50, 933.50 and 381.80 is: 526.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.50 : 933.50 = 381.80 : x
  2. Step 2: Convert to fraction form
    676.50/933.50 = 381.80/x
  3. Step 3: Cross multiply
    676.50x = 933.50 × 381.80
  4. Step 4: Simplify right side
    676.50x = 356,410.30
  5. Step 5: Solve for x
    x = 356,410.30/676.50
  6. Step 6: Final answer
    x = 526.84

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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.