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Finding the Fourth Proportional to 551.50, 827.63 and 209.50

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Solution

The fourth proportional to 551.50, 827.63 and 209.50 is: 314.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.50 : 827.63 = 209.50 : x
  2. Step 2: Convert to fraction form
    551.50/827.63 = 209.50/x
  3. Step 3: Cross multiply
    551.50x = 827.63 × 209.50
  4. Step 4: Simplify right side
    551.50x = 173,388.49
  5. Step 5: Solve for x
    x = 173,388.49/551.50
  6. Step 6: Final answer
    x = 314.39

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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.