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Finding the Fourth Proportional to 676.78, 933.54 and 443.90

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Solution

The fourth proportional to 676.78, 933.54 and 443.90 is: 612.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.78 : 933.54 = 443.90 : x
  2. Step 2: Convert to fraction form
    676.78/933.54 = 443.90/x
  3. Step 3: Cross multiply
    676.78x = 933.54 × 443.90
  4. Step 4: Simplify right side
    676.78x = 414,398.41
  5. Step 5: Solve for x
    x = 414,398.41/676.78
  6. Step 6: Final answer
    x = 612.31

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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.