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Finding the Fourth Proportional to 553.44, 764 and 422.88

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Solution

The fourth proportional to 553.44, 764 and 422.88 is: 583.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.44 : 764 = 422.88 : x
  2. Step 2: Convert to fraction form
    553.44/764 = 422.88/x
  3. Step 3: Cross multiply
    553.44x = 764 × 422.88
  4. Step 4: Simplify right side
    553.44x = 323,080.32
  5. Step 5: Solve for x
    x = 323,080.32/553.44
  6. Step 6: Final answer
    x = 583.77

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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.