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Finding the Fourth Proportional to 543.33, 812.85 and 379.91

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Solution

The fourth proportional to 543.33, 812.85 and 379.91 is: 568.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.33 : 812.85 = 379.91 : x
  2. Step 2: Convert to fraction form
    543.33/812.85 = 379.91/x
  3. Step 3: Cross multiply
    543.33x = 812.85 × 379.91
  4. Step 4: Simplify right side
    543.33x = 308,805.78
  5. Step 5: Solve for x
    x = 308,805.78/543.33
  6. Step 6: Final answer
    x = 568.36

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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.