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Finding the Fourth Proportional to 424.15, 636.55 and 180.85

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Solution

The fourth proportional to 424.15, 636.55 and 180.85 is: 271.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.15 : 636.55 = 180.85 : x
  2. Step 2: Convert to fraction form
    424.15/636.55 = 180.85/x
  3. Step 3: Cross multiply
    424.15x = 636.55 × 180.85
  4. Step 4: Simplify right side
    424.15x = 115,115.98
  5. Step 5: Solve for x
    x = 115,115.98/424.15
  6. Step 6: Final answer
    x = 271.40

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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.