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Finding the Fourth Proportional to 326.40, 450.47 and 186.57

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Solution

The fourth proportional to 326.40, 450.47 and 186.57 is: 257.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.40 : 450.47 = 186.57 : x
  2. Step 2: Convert to fraction form
    326.40/450.47 = 186.57/x
  3. Step 3: Cross multiply
    326.40x = 450.47 × 186.57
  4. Step 4: Simplify right side
    326.40x = 84,044.13
  5. Step 5: Solve for x
    x = 84,044.13/326.40
  6. Step 6: Final answer
    x = 257.48

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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.