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Finding the Fourth Proportional to 588.11, 811.71 and 388.97

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Solution

The fourth proportional to 588.11, 811.71 and 388.97 is: 536.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    588.11 : 811.71 = 388.97 : x
  2. Step 2: Convert to fraction form
    588.11/811.71 = 388.97/x
  3. Step 3: Cross multiply
    588.11x = 811.71 × 388.97
  4. Step 4: Simplify right side
    588.11x = 315,730.84
  5. Step 5: Solve for x
    x = 315,730.84/588.11
  6. Step 6: Final answer
    x = 536.86

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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.