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Finding the Fourth Proportional to 393.20, 588.48 and 283.20

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Solution

The fourth proportional to 393.20, 588.48 and 283.20 is: 423.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    393.20 : 588.48 = 283.20 : x
  2. Step 2: Convert to fraction form
    393.20/588.48 = 283.20/x
  3. Step 3: Cross multiply
    393.20x = 588.48 × 283.20
  4. Step 4: Simplify right side
    393.20x = 166,657.54
  5. Step 5: Solve for x
    x = 166,657.54/393.20
  6. Step 6: Final answer
    x = 423.85

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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.