Home / 1,004.28-1,505.61-426.75

Finding the Fourth Proportional to 1,004.28, 1,505.61 and 426.75

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Solution

The fourth proportional to 1,004.28, 1,505.61 and 426.75 is: 639.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,004.28 : 1,505.61 = 426.75 : x
  2. Step 2: Convert to fraction form
    1,004.28/1,505.61 = 426.75/x
  3. Step 3: Cross multiply
    1,004.28x = 1,505.61 × 426.75
  4. Step 4: Simplify right side
    1,004.28x = 642,519.07
  5. Step 5: Solve for x
    x = 642,519.07/1,004.28
  6. Step 6: Final answer
    x = 639.78

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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.