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Finding the Fourth Proportional to 543.37, 815.08 and 173.21

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Solution

The fourth proportional to 543.37, 815.08 and 173.21 is: 259.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.37 : 815.08 = 173.21 : x
  2. Step 2: Convert to fraction form
    543.37/815.08 = 173.21/x
  3. Step 3: Cross multiply
    543.37x = 815.08 × 173.21
  4. Step 4: Simplify right side
    543.37x = 141,179.14
  5. Step 5: Solve for x
    x = 141,179.14/543.37
  6. Step 6: Final answer
    x = 259.82

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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.