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Finding the Fourth Proportional to 636.99, 953.64 and 328.11

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Solution

The fourth proportional to 636.99, 953.64 and 328.11 is: 491.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.99 : 953.64 = 328.11 : x
  2. Step 2: Convert to fraction form
    636.99/953.64 = 328.11/x
  3. Step 3: Cross multiply
    636.99x = 953.64 × 328.11
  4. Step 4: Simplify right side
    636.99x = 312,898.82
  5. Step 5: Solve for x
    x = 312,898.82/636.99
  6. Step 6: Final answer
    x = 491.21

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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.