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Finding the Fourth Proportional to 411.26, 615.60 and 396.99

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Solution

The fourth proportional to 411.26, 615.60 and 396.99 is: 594.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    411.26 : 615.60 = 396.99 : x
  2. Step 2: Convert to fraction form
    411.26/615.60 = 396.99/x
  3. Step 3: Cross multiply
    411.26x = 615.60 × 396.99
  4. Step 4: Simplify right side
    411.26x = 244,387.04
  5. Step 5: Solve for x
    x = 244,387.04/411.26
  6. Step 6: Final answer
    x = 594.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.