Home / 1,330.07-1,996.13-919.80

Finding the Fourth Proportional to 1,330.07, 1,996.13 and 919.80

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Solution

The fourth proportional to 1,330.07, 1,996.13 and 919.80 is: 1,380.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,330.07 : 1,996.13 = 919.80 : x
  2. Step 2: Convert to fraction form
    1,330.07/1,996.13 = 919.80/x
  3. Step 3: Cross multiply
    1,330.07x = 1,996.13 × 919.80
  4. Step 4: Simplify right side
    1,330.07x = 1,836,035.78
  5. Step 5: Solve for x
    x = 1,836,035.78/1,330.07
  6. Step 6: Final answer
    x = 1,380.41

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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.