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Finding the Fourth Proportional to 384.22, 575.61 and 280.33

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Solution

The fourth proportional to 384.22, 575.61 and 280.33 is: 419.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.22 : 575.61 = 280.33 : x
  2. Step 2: Convert to fraction form
    384.22/575.61 = 280.33/x
  3. Step 3: Cross multiply
    384.22x = 575.61 × 280.33
  4. Step 4: Simplify right side
    384.22x = 161,360.75
  5. Step 5: Solve for x
    x = 161,360.75/384.22
  6. Step 6: Final answer
    x = 419.97

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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.