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Finding the Fourth Proportional to 383.84, 529.96 and 279.12

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Solution

The fourth proportional to 383.84, 529.96 and 279.12 is: 385.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.84 : 529.96 = 279.12 : x
  2. Step 2: Convert to fraction form
    383.84/529.96 = 279.12/x
  3. Step 3: Cross multiply
    383.84x = 529.96 × 279.12
  4. Step 4: Simplify right side
    383.84x = 147,922.44
  5. Step 5: Solve for x
    x = 147,922.44/383.84
  6. Step 6: Final answer
    x = 385.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.