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Finding the Fourth Proportional to 551.72, 827.38 and 186.40

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Solution

The fourth proportional to 551.72, 827.38 and 186.40 is: 279.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.72 : 827.38 = 186.40 : x
  2. Step 2: Convert to fraction form
    551.72/827.38 = 186.40/x
  3. Step 3: Cross multiply
    551.72x = 827.38 × 186.40
  4. Step 4: Simplify right side
    551.72x = 154,223.63
  5. Step 5: Solve for x
    x = 154,223.63/551.72
  6. Step 6: Final answer
    x = 279.53

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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.