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Finding the Fourth Proportional to 553.14, 829.70 and 142.27

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Solution

The fourth proportional to 553.14, 829.70 and 142.27 is: 213.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.14 : 829.70 = 142.27 : x
  2. Step 2: Convert to fraction form
    553.14/829.70 = 142.27/x
  3. Step 3: Cross multiply
    553.14x = 829.70 × 142.27
  4. Step 4: Simplify right side
    553.14x = 118,042.28
  5. Step 5: Solve for x
    x = 118,042.28/553.14
  6. Step 6: Final answer
    x = 213.40

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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.