Home / 1,145.36-1,568.50-1,138.64

Finding the Fourth Proportional to 1,145.36, 1,568.50 and 1,138.64

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Solution

The fourth proportional to 1,145.36, 1,568.50 and 1,138.64 is: 1,559.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,145.36 : 1,568.50 = 1,138.64 : x
  2. Step 2: Convert to fraction form
    1,145.36/1,568.50 = 1,138.64/x
  3. Step 3: Cross multiply
    1,145.36x = 1,568.50 × 1,138.64
  4. Step 4: Simplify right side
    1,145.36x = 1,785,956.84
  5. Step 5: Solve for x
    x = 1,785,956.84/1,145.36
  6. Step 6: Final answer
    x = 1,559.30

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.