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Finding the Fourth Proportional to 401.81, 554.49 and 227.15

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Solution

The fourth proportional to 401.81, 554.49 and 227.15 is: 313.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.81 : 554.49 = 227.15 : x
  2. Step 2: Convert to fraction form
    401.81/554.49 = 227.15/x
  3. Step 3: Cross multiply
    401.81x = 554.49 × 227.15
  4. Step 4: Simplify right side
    401.81x = 125,952.40
  5. Step 5: Solve for x
    x = 125,952.40/401.81
  6. Step 6: Final answer
    x = 313.46

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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.