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Finding the Fourth Proportional to 487.51, 672.67 and 330.27

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Solution

The fourth proportional to 487.51, 672.67 and 330.27 is: 455.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.51 : 672.67 = 330.27 : x
  2. Step 2: Convert to fraction form
    487.51/672.67 = 330.27/x
  3. Step 3: Cross multiply
    487.51x = 672.67 × 330.27
  4. Step 4: Simplify right side
    487.51x = 222,162.72
  5. Step 5: Solve for x
    x = 222,162.72/487.51
  6. Step 6: Final answer
    x = 455.71

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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.