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Finding the Fourth Proportional to 326.58, 450.81 and 210.15

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Solution

The fourth proportional to 326.58, 450.81 and 210.15 is: 290.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.58 : 450.81 = 210.15 : x
  2. Step 2: Convert to fraction form
    326.58/450.81 = 210.15/x
  3. Step 3: Cross multiply
    326.58x = 450.81 × 210.15
  4. Step 4: Simplify right side
    326.58x = 94,737.72
  5. Step 5: Solve for x
    x = 94,737.72/326.58
  6. Step 6: Final answer
    x = 290.09

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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.