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Finding the Fourth Proportional to 326.04, 489.30 and 120.74

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Solution

The fourth proportional to 326.04, 489.30 and 120.74 is: 181.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.04 : 489.30 = 120.74 : x
  2. Step 2: Convert to fraction form
    326.04/489.30 = 120.74/x
  3. Step 3: Cross multiply
    326.04x = 489.30 × 120.74
  4. Step 4: Simplify right side
    326.04x = 59,078.08
  5. Step 5: Solve for x
    x = 59,078.08/326.04
  6. Step 6: Final answer
    x = 181.20

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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.