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Finding the Fourth Proportional to 395.31, 589.83 and 372.09

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Solution

The fourth proportional to 395.31, 589.83 and 372.09 is: 555.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.31 : 589.83 = 372.09 : x
  2. Step 2: Convert to fraction form
    395.31/589.83 = 372.09/x
  3. Step 3: Cross multiply
    395.31x = 589.83 × 372.09
  4. Step 4: Simplify right side
    395.31x = 219,469.84
  5. Step 5: Solve for x
    x = 219,469.84/395.31
  6. Step 6: Final answer
    x = 555.18

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.