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Finding the Fourth Proportional to 423.85, 635.78 and 180.21

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Solution

The fourth proportional to 423.85, 635.78 and 180.21 is: 270.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.85 : 635.78 = 180.21 : x
  2. Step 2: Convert to fraction form
    423.85/635.78 = 180.21/x
  3. Step 3: Cross multiply
    423.85x = 635.78 × 180.21
  4. Step 4: Simplify right side
    423.85x = 114,572.32
  5. Step 5: Solve for x
    x = 114,572.32/423.85
  6. Step 6: Final answer
    x = 270.31

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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.