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Finding the Fourth Proportional to 250.36, 345.16 and 217.55

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Solution

The fourth proportional to 250.36, 345.16 and 217.55 is: 299.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    250.36 : 345.16 = 217.55 : x
  2. Step 2: Convert to fraction form
    250.36/345.16 = 217.55/x
  3. Step 3: Cross multiply
    250.36x = 345.16 × 217.55
  4. Step 4: Simplify right side
    250.36x = 75,090.69
  5. Step 5: Solve for x
    x = 75,090.69/250.36
  6. Step 6: Final answer
    x = 299.93

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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.