Home / 422,921.12-634,382.76-142,635.20

Finding the Fourth Proportional to 422,921.12, 634,382.76 and 142,635.20

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Solution

The fourth proportional to 422,921.12, 634,382.76 and 142,635.20 is: 213,953.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,921.12 : 634,382.76 = 142,635.20 : x
  2. Step 2: Convert to fraction form
    422,921.12/634,382.76 = 142,635.20/x
  3. Step 3: Cross multiply
    422,921.12x = 634,382.76 × 142,635.20
  4. Step 4: Simplify right side
    422,921.12x = 90,485,311,849.15
  5. Step 5: Solve for x
    x = 90,485,311,849.15/422,921.12
  6. Step 6: Final answer
    x = 213,953.16

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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.