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Finding the Fourth Proportional to 551.61, 827.34 and 140.71

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Solution

The fourth proportional to 551.61, 827.34 and 140.71 is: 211.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.61 : 827.34 = 140.71 : x
  2. Step 2: Convert to fraction form
    551.61/827.34 = 140.71/x
  3. Step 3: Cross multiply
    551.61x = 827.34 × 140.71
  4. Step 4: Simplify right side
    551.61x = 116,416.69
  5. Step 5: Solve for x
    x = 116,416.69/551.61
  6. Step 6: Final answer
    x = 211.05

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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.