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Finding the Fourth Proportional to 408.27, 566.07 and 386.40

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Solution

The fourth proportional to 408.27, 566.07 and 386.40 is: 535.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.27 : 566.07 = 386.40 : x
  2. Step 2: Convert to fraction form
    408.27/566.07 = 386.40/x
  3. Step 3: Cross multiply
    408.27x = 566.07 × 386.40
  4. Step 4: Simplify right side
    408.27x = 218,729.45
  5. Step 5: Solve for x
    x = 218,729.45/408.27
  6. Step 6: Final answer
    x = 535.75

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.