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Finding the Fourth Proportional to 542.73, 815.43 and 347.81

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Solution

The fourth proportional to 542.73, 815.43 and 347.81 is: 522.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.73 : 815.43 = 347.81 : x
  2. Step 2: Convert to fraction form
    542.73/815.43 = 347.81/x
  3. Step 3: Cross multiply
    542.73x = 815.43 × 347.81
  4. Step 4: Simplify right side
    542.73x = 283,614.57
  5. Step 5: Solve for x
    x = 283,614.57/542.73
  6. Step 6: Final answer
    x = 522.57

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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.