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Finding the Fourth Proportional to 475.85, 712.87 and 280.44

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Solution

The fourth proportional to 475.85, 712.87 and 280.44 is: 420.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    475.85 : 712.87 = 280.44 : x
  2. Step 2: Convert to fraction form
    475.85/712.87 = 280.44/x
  3. Step 3: Cross multiply
    475.85x = 712.87 × 280.44
  4. Step 4: Simplify right side
    475.85x = 199,917.26
  5. Step 5: Solve for x
    x = 199,917.26/475.85
  6. Step 6: Final answer
    x = 420.13

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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.