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Finding the Fourth Proportional to 491.42, 673.31 and 484.91

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Solution

The fourth proportional to 491.42, 673.31 and 484.91 is: 664.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.42 : 673.31 = 484.91 : x
  2. Step 2: Convert to fraction form
    491.42/673.31 = 484.91/x
  3. Step 3: Cross multiply
    491.42x = 673.31 × 484.91
  4. Step 4: Simplify right side
    491.42x = 326,488.96
  5. Step 5: Solve for x
    x = 326,488.96/491.42
  6. Step 6: Final answer
    x = 664.39

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.