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Finding the Fourth Proportional to 254.65, 381.30 and 151.45

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Solution

The fourth proportional to 254.65, 381.30 and 151.45 is: 226.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.65 : 381.30 = 151.45 : x
  2. Step 2: Convert to fraction form
    254.65/381.30 = 151.45/x
  3. Step 3: Cross multiply
    254.65x = 381.30 × 151.45
  4. Step 4: Simplify right side
    254.65x = 57,747.89
  5. Step 5: Solve for x
    x = 57,747.89/254.65
  6. Step 6: Final answer
    x = 226.77

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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.