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Finding the Fourth Proportional to 253.95, 381.09 and 151.34

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Solution

The fourth proportional to 253.95, 381.09 and 151.34 is: 227.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.95 : 381.09 = 151.34 : x
  2. Step 2: Convert to fraction form
    253.95/381.09 = 151.34/x
  3. Step 3: Cross multiply
    253.95x = 381.09 × 151.34
  4. Step 4: Simplify right side
    253.95x = 57,672.26
  5. Step 5: Solve for x
    x = 57,672.26/253.95
  6. Step 6: Final answer
    x = 227.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.