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Finding the Fourth Proportional to 3,238.76, 4,468.90 and 1,912.68

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Solution

The fourth proportional to 3,238.76, 4,468.90 and 1,912.68 is: 2,639.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,238.76 : 4,468.90 = 1,912.68 : x
  2. Step 2: Convert to fraction form
    3,238.76/4,468.90 = 1,912.68/x
  3. Step 3: Cross multiply
    3,238.76x = 4,468.90 × 1,912.68
  4. Step 4: Simplify right side
    3,238.76x = 8,547,575.65
  5. Step 5: Solve for x
    x = 8,547,575.65/3,238.76
  6. Step 6: Final answer
    x = 2,639.15

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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.