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Finding the Fourth Proportional to 636.99, 955.43 and 247.28

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Solution

The fourth proportional to 636.99, 955.43 and 247.28 is: 370.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.99 : 955.43 = 247.28 : x
  2. Step 2: Convert to fraction form
    636.99/955.43 = 247.28/x
  3. Step 3: Cross multiply
    636.99x = 955.43 × 247.28
  4. Step 4: Simplify right side
    636.99x = 236,252.72
  5. Step 5: Solve for x
    x = 236,252.72/636.99
  6. Step 6: Final answer
    x = 370.89

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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.