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Finding the Fourth Proportional to 483.15, 671.22 and 478.65

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Solution

The fourth proportional to 483.15, 671.22 and 478.65 is: 664.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.15 : 671.22 = 478.65 : x
  2. Step 2: Convert to fraction form
    483.15/671.22 = 478.65/x
  3. Step 3: Cross multiply
    483.15x = 671.22 × 478.65
  4. Step 4: Simplify right side
    483.15x = 321,279.45
  5. Step 5: Solve for x
    x = 321,279.45/483.15
  6. Step 6: Final answer
    x = 664.97

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.