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Finding the Fourth Proportional to 636.52, 877.02 and 439.64

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Solution

The fourth proportional to 636.52, 877.02 and 439.64 is: 605.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.52 : 877.02 = 439.64 : x
  2. Step 2: Convert to fraction form
    636.52/877.02 = 439.64/x
  3. Step 3: Cross multiply
    636.52x = 877.02 × 439.64
  4. Step 4: Simplify right side
    636.52x = 385,573.07
  5. Step 5: Solve for x
    x = 385,573.07/636.52
  6. Step 6: Final answer
    x = 605.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.