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Finding the Fourth Proportional to 558.72, 771.10 and 325.85

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Solution

The fourth proportional to 558.72, 771.10 and 325.85 is: 449.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.72 : 771.10 = 325.85 : x
  2. Step 2: Convert to fraction form
    558.72/771.10 = 325.85/x
  3. Step 3: Cross multiply
    558.72x = 771.10 × 325.85
  4. Step 4: Simplify right side
    558.72x = 251,258.26
  5. Step 5: Solve for x
    x = 251,258.26/558.72
  6. Step 6: Final answer
    x = 449.70

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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.