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Finding the Fourth Proportional to 636.52, 948.96 and 628.40

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Solution

The fourth proportional to 636.52, 948.96 and 628.40 is: 936.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.52 : 948.96 = 628.40 : x
  2. Step 2: Convert to fraction form
    636.52/948.96 = 628.40/x
  3. Step 3: Cross multiply
    636.52x = 948.96 × 628.40
  4. Step 4: Simplify right side
    636.52x = 596,326.46
  5. Step 5: Solve for x
    x = 596,326.46/636.52
  6. Step 6: Final answer
    x = 936.85

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.