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Finding the Fourth Proportional to 325.60, 449.51 and 221.25

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Solution

The fourth proportional to 325.60, 449.51 and 221.25 is: 305.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.60 : 449.51 = 221.25 : x
  2. Step 2: Convert to fraction form
    325.60/449.51 = 221.25/x
  3. Step 3: Cross multiply
    325.60x = 449.51 × 221.25
  4. Step 4: Simplify right side
    325.60x = 99,454.09
  5. Step 5: Solve for x
    x = 99,454.09/325.60
  6. Step 6: Final answer
    x = 305.45

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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.