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Finding the Fourth Proportional to 407.94, 563.67 and 321.27

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Solution

The fourth proportional to 407.94, 563.67 and 321.27 is: 443.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.94 : 563.67 = 321.27 : x
  2. Step 2: Convert to fraction form
    407.94/563.67 = 321.27/x
  3. Step 3: Cross multiply
    407.94x = 563.67 × 321.27
  4. Step 4: Simplify right side
    407.94x = 181,090.26
  5. Step 5: Solve for x
    x = 181,090.26/407.94
  6. Step 6: Final answer
    x = 443.91

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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.