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Finding the Fourth Proportional to 558.79, 771.29 and 325.96

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Solution

The fourth proportional to 558.79, 771.29 and 325.96 is: 449.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.79 : 771.29 = 325.96 : x
  2. Step 2: Convert to fraction form
    558.79/771.29 = 325.96/x
  3. Step 3: Cross multiply
    558.79x = 771.29 × 325.96
  4. Step 4: Simplify right side
    558.79x = 251,409.69
  5. Step 5: Solve for x
    x = 251,409.69/558.79
  6. Step 6: Final answer
    x = 449.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.