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Finding the Fourth Proportional to 441.60, 662.00 and 393

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Solution

The fourth proportional to 441.60, 662.00 and 393 is: 589.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    441.60 : 662.00 = 393 : x
  2. Step 2: Convert to fraction form
    441.60/662.00 = 393/x
  3. Step 3: Cross multiply
    441.60x = 662.00 × 393
  4. Step 4: Simplify right side
    441.60x = 260,164.04
  5. Step 5: Solve for x
    x = 260,164.04/441.60
  6. Step 6: Final answer
    x = 589.14

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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.