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Finding the Fourth Proportional to 551.48, 827.18 and 140.63

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Solution

The fourth proportional to 551.48, 827.18 and 140.63 is: 210.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.48 : 827.18 = 140.63 : x
  2. Step 2: Convert to fraction form
    551.48/827.18 = 140.63/x
  3. Step 3: Cross multiply
    551.48x = 827.18 × 140.63
  4. Step 4: Simplify right side
    551.48x = 116,321.48
  5. Step 5: Solve for x
    x = 116,321.48/551.48
  6. Step 6: Final answer
    x = 210.93

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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.