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Finding the Fourth Proportional to 488.82, 672.92 and 378.09

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Solution

The fourth proportional to 488.82, 672.92 and 378.09 is: 520.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.82 : 672.92 = 378.09 : x
  2. Step 2: Convert to fraction form
    488.82/672.92 = 378.09/x
  3. Step 3: Cross multiply
    488.82x = 672.92 × 378.09
  4. Step 4: Simplify right side
    488.82x = 254,425.98
  5. Step 5: Solve for x
    x = 254,425.98/488.82
  6. Step 6: Final answer
    x = 520.49

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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.