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Finding the Fourth Proportional to 570.50, 855.87 and 185.78

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Solution

The fourth proportional to 570.50, 855.87 and 185.78 is: 278.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.50 : 855.87 = 185.78 : x
  2. Step 2: Convert to fraction form
    570.50/855.87 = 185.78/x
  3. Step 3: Cross multiply
    570.50x = 855.87 × 185.78
  4. Step 4: Simplify right side
    570.50x = 159,003.53
  5. Step 5: Solve for x
    x = 159,003.53/570.50
  6. Step 6: Final answer
    x = 278.71

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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.