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Finding the Fourth Proportional to 475.30, 713.76 and 445.42

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Solution

The fourth proportional to 475.30, 713.76 and 445.42 is: 668.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    475.30 : 713.76 = 445.42 : x
  2. Step 2: Convert to fraction form
    475.30/713.76 = 445.42/x
  3. Step 3: Cross multiply
    475.30x = 713.76 × 445.42
  4. Step 4: Simplify right side
    475.30x = 317,922.98
  5. Step 5: Solve for x
    x = 317,922.98/475.30
  6. Step 6: Final answer
    x = 668.89

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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.