Home / 1,989.11-2,983.56-756.42

Finding the Fourth Proportional to 1,989.11, 2,983.56 and 756.42

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Solution

The fourth proportional to 1,989.11, 2,983.56 and 756.42 is: 1,134.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.11 : 2,983.56 = 756.42 : x
  2. Step 2: Convert to fraction form
    1,989.11/2,983.56 = 756.42/x
  3. Step 3: Cross multiply
    1,989.11x = 2,983.56 × 756.42
  4. Step 4: Simplify right side
    1,989.11x = 2,256,824.46
  5. Step 5: Solve for x
    x = 2,256,824.46/1,989.11
  6. Step 6: Final answer
    x = 1,134.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.