Home / 422,928.20-634,393.26-142,642.28

Finding the Fourth Proportional to 422,928.20, 634,393.26 and 142,642.28

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Solution

The fourth proportional to 422,928.20, 634,393.26 and 142,642.28 is: 213,963.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,928.20 : 634,393.26 = 142,642.28 : x
  2. Step 2: Convert to fraction form
    422,928.20/634,393.26 = 142,642.28/x
  3. Step 3: Cross multiply
    422,928.20x = 634,393.26 × 142,642.28
  4. Step 4: Simplify right side
    422,928.20x = 90,491,301,023.03
  5. Step 5: Solve for x
    x = 90,491,301,023.03/422,928.20
  6. Step 6: Final answer
    x = 213,963.74

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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.