Home / 1,399.68-2,087.28-1,333.44

Finding the Fourth Proportional to 1,399.68, 2,087.28 and 1,333.44

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Solution

The fourth proportional to 1,399.68, 2,087.28 and 1,333.44 is: 1,988.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,399.68 : 2,087.28 = 1,333.44 : x
  2. Step 2: Convert to fraction form
    1,399.68/2,087.28 = 1,333.44/x
  3. Step 3: Cross multiply
    1,399.68x = 2,087.28 × 1,333.44
  4. Step 4: Simplify right side
    1,399.68x = 2,783,262.64
  5. Step 5: Solve for x
    x = 2,783,262.64/1,399.68
  6. Step 6: Final answer
    x = 1,988.50

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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.