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Finding the Fourth Proportional to 543.86, 816.15 and 235.70

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Solution

The fourth proportional to 543.86, 816.15 and 235.70 is: 353.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.86 : 816.15 = 235.70 : x
  2. Step 2: Convert to fraction form
    543.86/816.15 = 235.70/x
  3. Step 3: Cross multiply
    543.86x = 816.15 × 235.70
  4. Step 4: Simplify right side
    543.86x = 192,366.56
  5. Step 5: Solve for x
    x = 192,366.56/543.86
  6. Step 6: Final answer
    x = 353.71

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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.