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Finding the Fourth Proportional to 636.28, 875.97 and 553.34

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Solution

The fourth proportional to 636.28, 875.97 and 553.34 is: 761.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.28 : 875.97 = 553.34 : x
  2. Step 2: Convert to fraction form
    636.28/875.97 = 553.34/x
  3. Step 3: Cross multiply
    636.28x = 875.97 × 553.34
  4. Step 4: Simplify right side
    636.28x = 484,709.91
  5. Step 5: Solve for x
    x = 484,709.91/636.28
  6. Step 6: Final answer
    x = 761.79

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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.