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Finding the Fourth Proportional to 543.45, 814.39 and 347.84

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Solution

The fourth proportional to 543.45, 814.39 and 347.84 is: 521.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.45 : 814.39 = 347.84 : x
  2. Step 2: Convert to fraction form
    543.45/814.39 = 347.84/x
  3. Step 3: Cross multiply
    543.45x = 814.39 × 347.84
  4. Step 4: Simplify right side
    543.45x = 283,277.42
  5. Step 5: Solve for x
    x = 283,277.42/543.45
  6. Step 6: Final answer
    x = 521.26

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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.