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Finding the Fourth Proportional to 384.50, 576.80 and 355.75

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Solution

The fourth proportional to 384.50, 576.80 and 355.75 is: 533.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.50 : 576.80 = 355.75 : x
  2. Step 2: Convert to fraction form
    384.50/576.80 = 355.75/x
  3. Step 3: Cross multiply
    384.50x = 576.80 × 355.75
  4. Step 4: Simplify right side
    384.50x = 205,196.60
  5. Step 5: Solve for x
    x = 205,196.60/384.50
  6. Step 6: Final answer
    x = 533.67

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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.