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Finding the Fourth Proportional to 636.22, 955.14 and 540.64

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Solution

The fourth proportional to 636.22, 955.14 and 540.64 is: 811.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.22 : 955.14 = 540.64 : x
  2. Step 2: Convert to fraction form
    636.22/955.14 = 540.64/x
  3. Step 3: Cross multiply
    636.22x = 955.14 × 540.64
  4. Step 4: Simplify right side
    636.22x = 516,386.89
  5. Step 5: Solve for x
    x = 516,386.89/636.22
  6. Step 6: Final answer
    x = 811.65

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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.