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Finding the Fourth Proportional to 636.99, 955.45 and 312.25

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Solution

The fourth proportional to 636.99, 955.45 and 312.25 is: 468.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.99 : 955.45 = 312.25 : x
  2. Step 2: Convert to fraction form
    636.99/955.45 = 312.25/x
  3. Step 3: Cross multiply
    636.99x = 955.45 × 312.25
  4. Step 4: Simplify right side
    636.99x = 298,339.26
  5. Step 5: Solve for x
    x = 298,339.26/636.99
  6. Step 6: Final answer
    x = 468.36

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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.