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Finding the Fourth Proportional to 401.36, 551.21 and 335.75

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Solution

The fourth proportional to 401.36, 551.21 and 335.75 is: 461.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.36 : 551.21 = 335.75 : x
  2. Step 2: Convert to fraction form
    401.36/551.21 = 335.75/x
  3. Step 3: Cross multiply
    401.36x = 551.21 × 335.75
  4. Step 4: Simplify right side
    401.36x = 185,064.32
  5. Step 5: Solve for x
    x = 185,064.32/401.36
  6. Step 6: Final answer
    x = 461.10

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.