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Finding the Fourth Proportional to 571.86, 856.98 and 328.46

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Solution

The fourth proportional to 571.86, 856.98 and 328.46 is: 492.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.86 : 856.98 = 328.46 : x
  2. Step 2: Convert to fraction form
    571.86/856.98 = 328.46/x
  3. Step 3: Cross multiply
    571.86x = 856.98 × 328.46
  4. Step 4: Simplify right side
    571.86x = 281,479.37
  5. Step 5: Solve for x
    x = 281,479.37/571.86
  6. Step 6: Final answer
    x = 492.22

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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.