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Finding the Fourth Proportional to 551.72, 826.50 and 320.60

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Solution

The fourth proportional to 551.72, 826.50 and 320.60 is: 480.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.72 : 826.50 = 320.60 : x
  2. Step 2: Convert to fraction form
    551.72/826.50 = 320.60/x
  3. Step 3: Cross multiply
    551.72x = 826.50 × 320.60
  4. Step 4: Simplify right side
    551.72x = 264,975.90
  5. Step 5: Solve for x
    x = 264,975.90/551.72
  6. Step 6: Final answer
    x = 480.27

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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.