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Finding the Fourth Proportional to 676.68, 933.82 and 428.44

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Solution

The fourth proportional to 676.68, 933.82 and 428.44 is: 591.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.68 : 933.82 = 428.44 : x
  2. Step 2: Convert to fraction form
    676.68/933.82 = 428.44/x
  3. Step 3: Cross multiply
    676.68x = 933.82 × 428.44
  4. Step 4: Simplify right side
    676.68x = 400,085.84
  5. Step 5: Solve for x
    x = 400,085.84/676.68
  6. Step 6: Final answer
    x = 591.25

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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.