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Finding the Fourth Proportional to 487.41, 672.73 and 321.65

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Solution

The fourth proportional to 487.41, 672.73 and 321.65 is: 443.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.41 : 672.73 = 321.65 : x
  2. Step 2: Convert to fraction form
    487.41/672.73 = 321.65/x
  3. Step 3: Cross multiply
    487.41x = 672.73 × 321.65
  4. Step 4: Simplify right side
    487.41x = 216,383.60
  5. Step 5: Solve for x
    x = 216,383.60/487.41
  6. Step 6: Final answer
    x = 443.95

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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.