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Finding the Fourth Proportional to 401.77, 554.28 and 227.08

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Solution

The fourth proportional to 401.77, 554.28 and 227.08 is: 313.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.77 : 554.28 = 227.08 : x
  2. Step 2: Convert to fraction form
    401.77/554.28 = 227.08/x
  3. Step 3: Cross multiply
    401.77x = 554.28 × 227.08
  4. Step 4: Simplify right side
    401.77x = 125,865.90
  5. Step 5: Solve for x
    x = 125,865.90/401.77
  6. Step 6: Final answer
    x = 313.28

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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.