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Finding the Fourth Proportional to 557.20, 835.66 and 191.89

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Solution

The fourth proportional to 557.20, 835.66 and 191.89 is: 287.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    557.20 : 835.66 = 191.89 : x
  2. Step 2: Convert to fraction form
    557.20/835.66 = 191.89/x
  3. Step 3: Cross multiply
    557.20x = 835.66 × 191.89
  4. Step 4: Simplify right side
    557.20x = 160,354.80
  5. Step 5: Solve for x
    x = 160,354.80/557.20
  6. Step 6: Final answer
    x = 287.79

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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.