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Finding the Fourth Proportional to 676.78, 1,014.55 and 243.84

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Solution

The fourth proportional to 676.78, 1,014.55 and 243.84 is: 365.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.78 : 1,014.55 = 243.84 : x
  2. Step 2: Convert to fraction form
    676.78/1,014.55 = 243.84/x
  3. Step 3: Cross multiply
    676.78x = 1,014.55 × 243.84
  4. Step 4: Simplify right side
    676.78x = 247,387.87
  5. Step 5: Solve for x
    x = 247,387.87/676.78
  6. Step 6: Final answer
    x = 365.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.