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Finding the Fourth Proportional to 326.57, 450.70 and 228.15

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Solution

The fourth proportional to 326.57, 450.70 and 228.15 is: 314.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.57 : 450.70 = 228.15 : x
  2. Step 2: Convert to fraction form
    326.57/450.70 = 228.15/x
  3. Step 3: Cross multiply
    326.57x = 450.70 × 228.15
  4. Step 4: Simplify right side
    326.57x = 102,826.63
  5. Step 5: Solve for x
    x = 102,826.63/326.57
  6. Step 6: Final answer
    x = 314.87

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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.