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Finding the Fourth Proportional to 488.05, 672.73 and 330.63

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Solution

The fourth proportional to 488.05, 672.73 and 330.63 is: 455.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.05 : 672.73 = 330.63 : x
  2. Step 2: Convert to fraction form
    488.05/672.73 = 330.63/x
  3. Step 3: Cross multiply
    488.05x = 672.73 × 330.63
  4. Step 4: Simplify right side
    488.05x = 222,426.08
  5. Step 5: Solve for x
    x = 222,426.08/488.05
  6. Step 6: Final answer
    x = 455.74

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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.