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Finding the Fourth Proportional to 570.45, 855.68 and 205.23

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Solution

The fourth proportional to 570.45, 855.68 and 205.23 is: 307.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.45 : 855.68 = 205.23 : x
  2. Step 2: Convert to fraction form
    570.45/855.68 = 205.23/x
  3. Step 3: Cross multiply
    570.45x = 855.68 × 205.23
  4. Step 4: Simplify right side
    570.45x = 175,611.21
  5. Step 5: Solve for x
    x = 175,611.21/570.45
  6. Step 6: Final answer
    x = 307.85

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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.