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Finding the Fourth Proportional to 571.89, 858.06 and 206.72

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Solution

The fourth proportional to 571.89, 858.06 and 206.72 is: 310.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.89 : 858.06 = 206.72 : x
  2. Step 2: Convert to fraction form
    571.89/858.06 = 206.72/x
  3. Step 3: Cross multiply
    571.89x = 858.06 × 206.72
  4. Step 4: Simplify right side
    571.89x = 177,377.09
  5. Step 5: Solve for x
    x = 177,377.09/571.89
  6. Step 6: Final answer
    x = 310.16

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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.