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Finding the Fourth Proportional to 570.57, 855.89 and 245.85

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Solution

The fourth proportional to 570.57, 855.89 and 245.85 is: 368.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.57 : 855.89 = 245.85 : x
  2. Step 2: Convert to fraction form
    570.57/855.89 = 245.85/x
  3. Step 3: Cross multiply
    570.57x = 855.89 × 245.85
  4. Step 4: Simplify right side
    570.57x = 210,420.56
  5. Step 5: Solve for x
    x = 210,420.56/570.57
  6. Step 6: Final answer
    x = 368.79

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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.