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Finding the Fourth Proportional to 253.05, 348.36 and 218.55

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Solution

The fourth proportional to 253.05, 348.36 and 218.55 is: 300.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.05 : 348.36 = 218.55 : x
  2. Step 2: Convert to fraction form
    253.05/348.36 = 218.55/x
  3. Step 3: Cross multiply
    253.05x = 348.36 × 218.55
  4. Step 4: Simplify right side
    253.05x = 76,134.08
  5. Step 5: Solve for x
    x = 76,134.08/253.05
  6. Step 6: Final answer
    x = 300.87

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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.