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Finding the Fourth Proportional to 357.55, 493.39 and 217.65

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Solution

The fourth proportional to 357.55, 493.39 and 217.65 is: 300.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.55 : 493.39 = 217.65 : x
  2. Step 2: Convert to fraction form
    357.55/493.39 = 217.65/x
  3. Step 3: Cross multiply
    357.55x = 493.39 × 217.65
  4. Step 4: Simplify right side
    357.55x = 107,388.46
  5. Step 5: Solve for x
    x = 107,388.46/357.55
  6. Step 6: Final answer
    x = 300.35

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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.