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Finding the Fourth Proportional to 288.09, 434.54 and 254.28

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Solution

The fourth proportional to 288.09, 434.54 and 254.28 is: 383.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.09 : 434.54 = 254.28 : x
  2. Step 2: Convert to fraction form
    288.09/434.54 = 254.28/x
  3. Step 3: Cross multiply
    288.09x = 434.54 × 254.28
  4. Step 4: Simplify right side
    288.09x = 110,493.56
  5. Step 5: Solve for x
    x = 110,493.56/288.09
  6. Step 6: Final answer
    x = 383.54

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.