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Finding the Fourth Proportional to 571.92, 857.79 and 206.88

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Solution

The fourth proportional to 571.92, 857.79 and 206.88 is: 310.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.92 : 857.79 = 206.88 : x
  2. Step 2: Convert to fraction form
    571.92/857.79 = 206.88/x
  3. Step 3: Cross multiply
    571.92x = 857.79 × 206.88
  4. Step 4: Simplify right side
    571.92x = 177,459.60
  5. Step 5: Solve for x
    x = 177,459.60/571.92
  6. Step 6: Final answer
    x = 310.29

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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.