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Finding the Fourth Proportional to 676.11, 933 and 381.40

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Solution

The fourth proportional to 676.11, 933 and 381.40 is: 526.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.11 : 933 = 381.40 : x
  2. Step 2: Convert to fraction form
    676.11/933 = 381.40/x
  3. Step 3: Cross multiply
    676.11x = 933 × 381.40
  4. Step 4: Simplify right side
    676.11x = 355,846.20
  5. Step 5: Solve for x
    x = 355,846.20/676.11
  6. Step 6: Final answer
    x = 526.31

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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.