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Finding the Fourth Proportional to 475.79, 713.00 and 280.33

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Solution

The fourth proportional to 475.79, 713.00 and 280.33 is: 420.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    475.79 : 713.00 = 280.33 : x
  2. Step 2: Convert to fraction form
    475.79/713.00 = 280.33/x
  3. Step 3: Cross multiply
    475.79x = 713.00 × 280.33
  4. Step 4: Simplify right side
    475.79x = 199,872.81
  5. Step 5: Solve for x
    x = 199,872.81/475.79
  6. Step 6: Final answer
    x = 420.09

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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.