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Finding the Fourth Proportional to 306.36, 459 and 254.72

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Solution

The fourth proportional to 306.36, 459 and 254.72 is: 381.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.36 : 459 = 254.72 : x
  2. Step 2: Convert to fraction form
    306.36/459 = 254.72/x
  3. Step 3: Cross multiply
    306.36x = 459 × 254.72
  4. Step 4: Simplify right side
    306.36x = 116,916.48
  5. Step 5: Solve for x
    x = 116,916.48/306.36
  6. Step 6: Final answer
    x = 381.63

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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.