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Finding the Fourth Proportional to 326.28, 450.72 and 260.64

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Solution

The fourth proportional to 326.28, 450.72 and 260.64 is: 360.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.28 : 450.72 = 260.64 : x
  2. Step 2: Convert to fraction form
    326.28/450.72 = 260.64/x
  3. Step 3: Cross multiply
    326.28x = 450.72 × 260.64
  4. Step 4: Simplify right side
    326.28x = 117,475.66
  5. Step 5: Solve for x
    x = 117,475.66/326.28
  6. Step 6: Final answer
    x = 360.05

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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.