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Finding the Fourth Proportional to 1,352.61, 2,028.91 and 326.61

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Solution

The fourth proportional to 1,352.61, 2,028.91 and 326.61 is: 489.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,352.61 : 2,028.91 = 326.61 : x
  2. Step 2: Convert to fraction form
    1,352.61/2,028.91 = 326.61/x
  3. Step 3: Cross multiply
    1,352.61x = 2,028.91 × 326.61
  4. Step 4: Simplify right side
    1,352.61x = 662,662.30
  5. Step 5: Solve for x
    x = 662,662.30/1,352.61
  6. Step 6: Final answer
    x = 489.91

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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.