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Finding the Fourth Proportional to 451.99, 623.73 and 321.18

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Solution

The fourth proportional to 451.99, 623.73 and 321.18 is: 443.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.99 : 623.73 = 321.18 : x
  2. Step 2: Convert to fraction form
    451.99/623.73 = 321.18/x
  3. Step 3: Cross multiply
    451.99x = 623.73 × 321.18
  4. Step 4: Simplify right side
    451.99x = 200,326.48
  5. Step 5: Solve for x
    x = 200,326.48/451.99
  6. Step 6: Final answer
    x = 443.21

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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.