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Finding the Fourth Proportional to 384.42, 576.79 and 156.58

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Solution

The fourth proportional to 384.42, 576.79 and 156.58 is: 234.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.42 : 576.79 = 156.58 : x
  2. Step 2: Convert to fraction form
    384.42/576.79 = 156.58/x
  3. Step 3: Cross multiply
    384.42x = 576.79 × 156.58
  4. Step 4: Simplify right side
    384.42x = 90,313.78
  5. Step 5: Solve for x
    x = 90,313.78/384.42
  6. Step 6: Final answer
    x = 234.94

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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.