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Finding the Fourth Proportional to 571.26, 856.90 and 206.08

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Solution

The fourth proportional to 571.26, 856.90 and 206.08 is: 309.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.26 : 856.90 = 206.08 : x
  2. Step 2: Convert to fraction form
    571.26/856.90 = 206.08/x
  3. Step 3: Cross multiply
    571.26x = 856.90 × 206.08
  4. Step 4: Simplify right side
    571.26x = 176,591.73
  5. Step 5: Solve for x
    x = 176,591.73/571.26
  6. Step 6: Final answer
    x = 309.13

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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.