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Finding the Fourth Proportional to 571.46, 857.39 and 206.55

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Solution

The fourth proportional to 571.46, 857.39 and 206.55 is: 309.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.46 : 857.39 = 206.55 : x
  2. Step 2: Convert to fraction form
    571.46/857.39 = 206.55/x
  3. Step 3: Cross multiply
    571.46x = 857.39 × 206.55
  4. Step 4: Simplify right side
    571.46x = 177,092.87
  5. Step 5: Solve for x
    x = 177,092.87/571.46
  6. Step 6: Final answer
    x = 309.90

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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.