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Finding the Fourth Proportional to 270.49, 372.89 and 228.87

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Solution

The fourth proportional to 270.49, 372.89 and 228.87 is: 315.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    270.49 : 372.89 = 228.87 : x
  2. Step 2: Convert to fraction form
    270.49/372.89 = 228.87/x
  3. Step 3: Cross multiply
    270.49x = 372.89 × 228.87
  4. Step 4: Simplify right side
    270.49x = 85,343.33
  5. Step 5: Solve for x
    x = 85,343.33/270.49
  6. Step 6: Final answer
    x = 315.51

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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.