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Finding the Fourth Proportional to 423.28, 582.96 and 393.04

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Solution

The fourth proportional to 423.28, 582.96 and 393.04 is: 541.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.28 : 582.96 = 393.04 : x
  2. Step 2: Convert to fraction form
    423.28/582.96 = 393.04/x
  3. Step 3: Cross multiply
    423.28x = 582.96 × 393.04
  4. Step 4: Simplify right side
    423.28x = 229,126.60
  5. Step 5: Solve for x
    x = 229,126.60/423.28
  6. Step 6: Final answer
    x = 541.31

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.