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Finding the Fourth Proportional to 281.46, 385.06 and 280.24

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Solution

The fourth proportional to 281.46, 385.06 and 280.24 is: 383.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.46 : 385.06 = 280.24 : x
  2. Step 2: Convert to fraction form
    281.46/385.06 = 280.24/x
  3. Step 3: Cross multiply
    281.46x = 385.06 × 280.24
  4. Step 4: Simplify right side
    281.46x = 107,909.21
  5. Step 5: Solve for x
    x = 107,909.21/281.46
  6. Step 6: Final answer
    x = 383.39

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.