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Finding the Fourth Proportional to 676.41, 1,014.93 and 387.86

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Solution

The fourth proportional to 676.41, 1,014.93 and 387.86 is: 581.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.41 : 1,014.93 = 387.86 : x
  2. Step 2: Convert to fraction form
    676.41/1,014.93 = 387.86/x
  3. Step 3: Cross multiply
    676.41x = 1,014.93 × 387.86
  4. Step 4: Simplify right side
    676.41x = 393,645.68
  5. Step 5: Solve for x
    x = 393,645.68/676.41
  6. Step 6: Final answer
    x = 581.96

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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.