Home / 3,212.40-4,432.80-1,815.12

Finding the Fourth Proportional to 3,212.40, 4,432.80 and 1,815.12

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Solution

The fourth proportional to 3,212.40, 4,432.80 and 1,815.12 is: 2,504.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,212.40 : 4,432.80 = 1,815.12 : x
  2. Step 2: Convert to fraction form
    3,212.40/4,432.80 = 1,815.12/x
  3. Step 3: Cross multiply
    3,212.40x = 4,432.80 × 1,815.12
  4. Step 4: Simplify right side
    3,212.40x = 8,046,063.94
  5. Step 5: Solve for x
    x = 8,046,063.94/3,212.40
  6. Step 6: Final answer
    x = 2,504.69

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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.