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Finding the Fourth Proportional to 357.86, 494.03 and 217.87

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Solution

The fourth proportional to 357.86, 494.03 and 217.87 is: 300.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.86 : 494.03 = 217.87 : x
  2. Step 2: Convert to fraction form
    357.86/494.03 = 217.87/x
  3. Step 3: Cross multiply
    357.86x = 494.03 × 217.87
  4. Step 4: Simplify right side
    357.86x = 107,633.63
  5. Step 5: Solve for x
    x = 107,633.63/357.86
  6. Step 6: Final answer
    x = 300.77

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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.