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Finding the Fourth Proportional to 401.49, 554.33 and 303.78

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Solution

The fourth proportional to 401.49, 554.33 and 303.78 is: 419.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.49 : 554.33 = 303.78 : x
  2. Step 2: Convert to fraction form
    401.49/554.33 = 303.78/x
  3. Step 3: Cross multiply
    401.49x = 554.33 × 303.78
  4. Step 4: Simplify right side
    401.49x = 168,394.37
  5. Step 5: Solve for x
    x = 168,394.37/401.49
  6. Step 6: Final answer
    x = 419.42

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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.