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Finding the Fourth Proportional to 491.08, 682.45 and 484.96

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Solution

The fourth proportional to 491.08, 682.45 and 484.96 is: 673.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.08 : 682.45 = 484.96 : x
  2. Step 2: Convert to fraction form
    491.08/682.45 = 484.96/x
  3. Step 3: Cross multiply
    491.08x = 682.45 × 484.96
  4. Step 4: Simplify right side
    491.08x = 330,960.95
  5. Step 5: Solve for x
    x = 330,960.95/491.08
  6. Step 6: Final answer
    x = 673.95

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.