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Finding the Fourth Proportional to 406.44, 559.68 and 397.36

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Solution

The fourth proportional to 406.44, 559.68 and 397.36 is: 547.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.44 : 559.68 = 397.36 : x
  2. Step 2: Convert to fraction form
    406.44/559.68 = 397.36/x
  3. Step 3: Cross multiply
    406.44x = 559.68 × 397.36
  4. Step 4: Simplify right side
    406.44x = 222,394.44
  5. Step 5: Solve for x
    x = 222,394.44/406.44
  6. Step 6: Final answer
    x = 547.18

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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.