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Finding the Fourth Proportional to 571.13, 855.63 and 326.92

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Solution

The fourth proportional to 571.13, 855.63 and 326.92 is: 489.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.13 : 855.63 = 326.92 : x
  2. Step 2: Convert to fraction form
    571.13/855.63 = 326.92/x
  3. Step 3: Cross multiply
    571.13x = 855.63 × 326.92
  4. Step 4: Simplify right side
    571.13x = 279,722.56
  5. Step 5: Solve for x
    x = 279,722.56/571.13
  6. Step 6: Final answer
    x = 489.77

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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.