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Finding the Fourth Proportional to 588.35, 811.58 and 399.62

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Solution

The fourth proportional to 588.35, 811.58 and 399.62 is: 551.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    588.35 : 811.58 = 399.62 : x
  2. Step 2: Convert to fraction form
    588.35/811.58 = 399.62/x
  3. Step 3: Cross multiply
    588.35x = 811.58 × 399.62
  4. Step 4: Simplify right side
    588.35x = 324,323.63
  5. Step 5: Solve for x
    x = 324,323.63/588.35
  6. Step 6: Final answer
    x = 551.24

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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.