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Finding the Fourth Proportional to 401.74, 554.21 and 235.85

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Solution

The fourth proportional to 401.74, 554.21 and 235.85 is: 325.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.74 : 554.21 = 235.85 : x
  2. Step 2: Convert to fraction form
    401.74/554.21 = 235.85/x
  3. Step 3: Cross multiply
    401.74x = 554.21 × 235.85
  4. Step 4: Simplify right side
    401.74x = 130,709.44
  5. Step 5: Solve for x
    x = 130,709.44/401.74
  6. Step 6: Final answer
    x = 325.36

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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.