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Finding the Fourth Proportional to 326.94, 490.55 and 172.83

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Solution

The fourth proportional to 326.94, 490.55 and 172.83 is: 259.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.94 : 490.55 = 172.83 : x
  2. Step 2: Convert to fraction form
    326.94/490.55 = 172.83/x
  3. Step 3: Cross multiply
    326.94x = 490.55 × 172.83
  4. Step 4: Simplify right side
    326.94x = 84,781.76
  5. Step 5: Solve for x
    x = 84,781.76/326.94
  6. Step 6: Final answer
    x = 259.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.