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Finding the Fourth Proportional to 671.69, 927 and 409.86

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Solution

The fourth proportional to 671.69, 927 and 409.86 is: 565.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.69 : 927 = 409.86 : x
  2. Step 2: Convert to fraction form
    671.69/927 = 409.86/x
  3. Step 3: Cross multiply
    671.69x = 927 × 409.86
  4. Step 4: Simplify right side
    671.69x = 379,940.22
  5. Step 5: Solve for x
    x = 379,940.22/671.69
  6. Step 6: Final answer
    x = 565.65

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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.