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Finding the Fourth Proportional to 543.24, 815.67 and 381.24

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Solution

The fourth proportional to 543.24, 815.67 and 381.24 is: 572.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.24 : 815.67 = 381.24 : x
  2. Step 2: Convert to fraction form
    543.24/815.67 = 381.24/x
  3. Step 3: Cross multiply
    543.24x = 815.67 × 381.24
  4. Step 4: Simplify right side
    543.24x = 310,966.03
  5. Step 5: Solve for x
    x = 310,966.03/543.24
  6. Step 6: Final answer
    x = 572.43

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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.