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Finding the Fourth Proportional to 552.99, 829.54 and 142.13

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Solution

The fourth proportional to 552.99, 829.54 and 142.13 is: 213.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.99 : 829.54 = 142.13 : x
  2. Step 2: Convert to fraction form
    552.99/829.54 = 142.13/x
  3. Step 3: Cross multiply
    552.99x = 829.54 × 142.13
  4. Step 4: Simplify right side
    552.99x = 117,904.24
  5. Step 5: Solve for x
    x = 117,904.24/552.99
  6. Step 6: Final answer
    x = 213.21

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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.