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Finding the Fourth Proportional to 475.33, 713.09 and 280.66

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Solution

The fourth proportional to 475.33, 713.09 and 280.66 is: 421.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    475.33 : 713.09 = 280.66 : x
  2. Step 2: Convert to fraction form
    475.33/713.09 = 280.66/x
  3. Step 3: Cross multiply
    475.33x = 713.09 × 280.66
  4. Step 4: Simplify right side
    475.33x = 200,135.84
  5. Step 5: Solve for x
    x = 200,135.84/475.33
  6. Step 6: Final answer
    x = 421.05

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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.