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Finding the Fourth Proportional to 401.49, 554.11 and 235.68

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Solution

The fourth proportional to 401.49, 554.11 and 235.68 is: 325.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.49 : 554.11 = 235.68 : x
  2. Step 2: Convert to fraction form
    401.49/554.11 = 235.68/x
  3. Step 3: Cross multiply
    401.49x = 554.11 × 235.68
  4. Step 4: Simplify right side
    401.49x = 130,592.64
  5. Step 5: Solve for x
    x = 130,592.64/401.49
  6. Step 6: Final answer
    x = 325.27

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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.