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Finding the Fourth Proportional to 543.97, 815.95 and 133.11

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Solution

The fourth proportional to 543.97, 815.95 and 133.11 is: 199.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.97 : 815.95 = 133.11 : x
  2. Step 2: Convert to fraction form
    543.97/815.95 = 133.11/x
  3. Step 3: Cross multiply
    543.97x = 815.95 × 133.11
  4. Step 4: Simplify right side
    543.97x = 108,611.10
  5. Step 5: Solve for x
    x = 108,611.10/543.97
  6. Step 6: Final answer
    x = 199.66

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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.