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Finding the Fourth Proportional to 553.28, 829.92 and 443.08

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Solution

The fourth proportional to 553.28, 829.92 and 443.08 is: 664.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.28 : 829.92 = 443.08 : x
  2. Step 2: Convert to fraction form
    553.28/829.92 = 443.08/x
  3. Step 3: Cross multiply
    553.28x = 829.92 × 443.08
  4. Step 4: Simplify right side
    553.28x = 367,718.88
  5. Step 5: Solve for x
    x = 367,718.88/553.28
  6. Step 6: Final answer
    x = 664.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.