Home / 1,396.04-2,078.87-1,380.70

Finding the Fourth Proportional to 1,396.04, 2,078.87 and 1,380.70

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Solution

The fourth proportional to 1,396.04, 2,078.87 and 1,380.70 is: 2,056.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,396.04 : 2,078.87 = 1,380.70 : x
  2. Step 2: Convert to fraction form
    1,396.04/2,078.87 = 1,380.70/x
  3. Step 3: Cross multiply
    1,396.04x = 2,078.87 × 1,380.70
  4. Step 4: Simplify right side
    1,396.04x = 2,870,283.71
  5. Step 5: Solve for x
    x = 2,870,283.71/1,396.04
  6. Step 6: Final answer
    x = 2,056.01

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1.5x scale

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.