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Finding the Fourth Proportional to 289.41, 434.34 and 255.24

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Solution

The fourth proportional to 289.41, 434.34 and 255.24 is: 383.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.41 : 434.34 = 255.24 : x
  2. Step 2: Convert to fraction form
    289.41/434.34 = 255.24/x
  3. Step 3: Cross multiply
    289.41x = 434.34 × 255.24
  4. Step 4: Simplify right side
    289.41x = 110,860.94
  5. Step 5: Solve for x
    x = 110,860.94/289.41
  6. Step 6: Final answer
    x = 383.06

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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.