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Finding the Fourth Proportional to 326.40, 450.36 and 228.40

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Solution

The fourth proportional to 326.40, 450.36 and 228.40 is: 315.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.40 : 450.36 = 228.40 : x
  2. Step 2: Convert to fraction form
    326.40/450.36 = 228.40/x
  3. Step 3: Cross multiply
    326.40x = 450.36 × 228.40
  4. Step 4: Simplify right side
    326.40x = 102,862.22
  5. Step 5: Solve for x
    x = 102,862.22/326.40
  6. Step 6: Final answer
    x = 315.14

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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.