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Finding the Fourth Proportional to 393, 589.44 and 263.80

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Solution

The fourth proportional to 393, 589.44 and 263.80 is: 395.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    393 : 589.44 = 263.80 : x
  2. Step 2: Convert to fraction form
    393/589.44 = 263.80/x
  3. Step 3: Cross multiply
    393x = 589.44 × 263.80
  4. Step 4: Simplify right side
    393x = 155,494.27
  5. Step 5: Solve for x
    x = 155,494.27/393
  6. Step 6: Final answer
    x = 395.66

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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.