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Finding the Fourth Proportional to 588.38, 811.64 and 396.79

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Solution

The fourth proportional to 588.38, 811.64 and 396.79 is: 547.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    588.38 : 811.64 = 396.79 : x
  2. Step 2: Convert to fraction form
    588.38/811.64 = 396.79/x
  3. Step 3: Cross multiply
    588.38x = 811.64 × 396.79
  4. Step 4: Simplify right side
    588.38x = 322,049.60
  5. Step 5: Solve for x
    x = 322,049.60/588.38
  6. Step 6: Final answer
    x = 547.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.