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Finding the Fourth Proportional to 636.17, 953.43 and 553.56

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Solution

The fourth proportional to 636.17, 953.43 and 553.56 is: 829.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.17 : 953.43 = 553.56 : x
  2. Step 2: Convert to fraction form
    636.17/953.43 = 553.56/x
  3. Step 3: Cross multiply
    636.17x = 953.43 × 553.56
  4. Step 4: Simplify right side
    636.17x = 527,778.17
  5. Step 5: Solve for x
    x = 527,778.17/636.17
  6. Step 6: Final answer
    x = 829.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.