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Finding the Fourth Proportional to 395.08, 588.41 and 389.08

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Solution

The fourth proportional to 395.08, 588.41 and 389.08 is: 579.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.08 : 588.41 = 389.08 : x
  2. Step 2: Convert to fraction form
    395.08/588.41 = 389.08/x
  3. Step 3: Cross multiply
    395.08x = 588.41 × 389.08
  4. Step 4: Simplify right side
    395.08x = 228,938.56
  5. Step 5: Solve for x
    x = 228,938.56/395.08
  6. Step 6: Final answer
    x = 579.47

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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.