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Finding the Fourth Proportional to 357.96, 494.04 and 208.58

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Solution

The fourth proportional to 357.96, 494.04 and 208.58 is: 287.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.96 : 494.04 = 208.58 : x
  2. Step 2: Convert to fraction form
    357.96/494.04 = 208.58/x
  3. Step 3: Cross multiply
    357.96x = 494.04 × 208.58
  4. Step 4: Simplify right side
    357.96x = 103,044.39
  5. Step 5: Solve for x
    x = 103,044.39/357.96
  6. Step 6: Final answer
    x = 287.87

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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.