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Finding the Fourth Proportional to 384, 576.16 and 191.60

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Solution

The fourth proportional to 384, 576.16 and 191.60 is: 287.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    384 : 576.16 = 191.60 : x
  2. Step 2: Convert to fraction form
    384/576.16 = 191.60/x
  3. Step 3: Cross multiply
    384x = 576.16 × 191.60
  4. Step 4: Simplify right side
    384x = 110,392.26
  5. Step 5: Solve for x
    x = 110,392.26/384
  6. Step 6: Final answer
    x = 287.48

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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.