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Finding the Fourth Proportional to 558.64, 770.90 and 325.90

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Solution

The fourth proportional to 558.64, 770.90 and 325.90 is: 449.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.64 : 770.90 = 325.90 : x
  2. Step 2: Convert to fraction form
    558.64/770.90 = 325.90/x
  3. Step 3: Cross multiply
    558.64x = 770.90 × 325.90
  4. Step 4: Simplify right side
    558.64x = 251,236.31
  5. Step 5: Solve for x
    x = 251,236.31/558.64
  6. Step 6: Final answer
    x = 449.73

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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.