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Finding the Fourth Proportional to 676.28, 933.35 and 396.57

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Solution

The fourth proportional to 676.28, 933.35 and 396.57 is: 547.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.28 : 933.35 = 396.57 : x
  2. Step 2: Convert to fraction form
    676.28/933.35 = 396.57/x
  3. Step 3: Cross multiply
    676.28x = 933.35 × 396.57
  4. Step 4: Simplify right side
    676.28x = 370,138.61
  5. Step 5: Solve for x
    x = 370,138.61/676.28
  6. Step 6: Final answer
    x = 547.32

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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.