Home / 1,396.32-2,084.18-1,280.88

Finding the Fourth Proportional to 1,396.32, 2,084.18 and 1,280.88

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Solution

The fourth proportional to 1,396.32, 2,084.18 and 1,280.88 is: 1,911.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,396.32 : 2,084.18 = 1,280.88 : x
  2. Step 2: Convert to fraction form
    1,396.32/2,084.18 = 1,280.88/x
  3. Step 3: Cross multiply
    1,396.32x = 2,084.18 × 1,280.88
  4. Step 4: Simplify right side
    1,396.32x = 2,669,584.48
  5. Step 5: Solve for x
    x = 2,669,584.48/1,396.32
  6. Step 6: Final answer
    x = 1,911.87

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.