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Finding the Fourth Proportional to 571.79, 856.14 and 398.09

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Solution

The fourth proportional to 571.79, 856.14 and 398.09 is: 596.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.79 : 856.14 = 398.09 : x
  2. Step 2: Convert to fraction form
    571.79/856.14 = 398.09/x
  3. Step 3: Cross multiply
    571.79x = 856.14 × 398.09
  4. Step 4: Simplify right side
    571.79x = 340,816.49
  5. Step 5: Solve for x
    x = 340,816.49/571.79
  6. Step 6: Final answer
    x = 596.06

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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.