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Finding the Fourth Proportional to 636.59, 949.35 and 554.78

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Solution

The fourth proportional to 636.59, 949.35 and 554.78 is: 827.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.59 : 949.35 = 554.78 : x
  2. Step 2: Convert to fraction form
    636.59/949.35 = 554.78/x
  3. Step 3: Cross multiply
    636.59x = 949.35 × 554.78
  4. Step 4: Simplify right side
    636.59x = 526,675.65
  5. Step 5: Solve for x
    x = 526,675.65/636.59
  6. Step 6: Final answer
    x = 827.35

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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.