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Finding the Fourth Proportional to 551.67, 826.32 and 447.09

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Solution

The fourth proportional to 551.67, 826.32 and 447.09 is: 669.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.67 : 826.32 = 447.09 : x
  2. Step 2: Convert to fraction form
    551.67/826.32 = 447.09/x
  3. Step 3: Cross multiply
    551.67x = 826.32 × 447.09
  4. Step 4: Simplify right side
    551.67x = 369,439.41
  5. Step 5: Solve for x
    x = 369,439.41/551.67
  6. Step 6: Final answer
    x = 669.67

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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.