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Finding the Fourth Proportional to 636.31, 877.93 and 374.28

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Solution

The fourth proportional to 636.31, 877.93 and 374.28 is: 516.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.31 : 877.93 = 374.28 : x
  2. Step 2: Convert to fraction form
    636.31/877.93 = 374.28/x
  3. Step 3: Cross multiply
    636.31x = 877.93 × 374.28
  4. Step 4: Simplify right side
    636.31x = 328,591.64
  5. Step 5: Solve for x
    x = 328,591.64/636.31
  6. Step 6: Final answer
    x = 516.40

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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.