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Finding the Fourth Proportional to 3,212.28, 4,433.28 and 1,815.48

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Solution

The fourth proportional to 3,212.28, 4,433.28 and 1,815.48 is: 2,505.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,212.28 : 4,433.28 = 1,815.48 : x
  2. Step 2: Convert to fraction form
    3,212.28/4,433.28 = 1,815.48/x
  3. Step 3: Cross multiply
    3,212.28x = 4,433.28 × 1,815.48
  4. Step 4: Simplify right side
    3,212.28x = 8,048,531.17
  5. Step 5: Solve for x
    x = 8,048,531.17/3,212.28
  6. Step 6: Final answer
    x = 2,505.55

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1.5x scale

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.