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Finding the Fourth Proportional to 551.64, 827.52 and 140.79

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Solution

The fourth proportional to 551.64, 827.52 and 140.79 is: 211.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.64 : 827.52 = 140.79 : x
  2. Step 2: Convert to fraction form
    551.64/827.52 = 140.79/x
  3. Step 3: Cross multiply
    551.64x = 827.52 × 140.79
  4. Step 4: Simplify right side
    551.64x = 116,506.54
  5. Step 5: Solve for x
    x = 116,506.54/551.64
  6. Step 6: Final answer
    x = 211.20

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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.