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Finding the Fourth Proportional to 1,352.50, 2,028.75 and 326.50

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Solution

The fourth proportional to 1,352.50, 2,028.75 and 326.50 is: 489.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,352.50 : 2,028.75 = 326.50 : x
  2. Step 2: Convert to fraction form
    1,352.50/2,028.75 = 326.50/x
  3. Step 3: Cross multiply
    1,352.50x = 2,028.75 × 326.50
  4. Step 4: Simplify right side
    1,352.50x = 662,386.88
  5. Step 5: Solve for x
    x = 662,386.88/1,352.50
  6. Step 6: Final answer
    x = 489.75

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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.