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Finding the Fourth Proportional to 422,836.74, 634,348.42 and 123,340.76

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Solution

The fourth proportional to 422,836.74, 634,348.42 and 123,340.76 is: 185,038.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,836.74 : 634,348.42 = 123,340.76 : x
  2. Step 2: Convert to fraction form
    422,836.74/634,348.42 = 123,340.76/x
  3. Step 3: Cross multiply
    422,836.74x = 634,348.42 × 123,340.76
  4. Step 4: Simplify right side
    422,836.74x = 78,241,016,227.60
  5. Step 5: Solve for x
    x = 78,241,016,227.60/422,836.74
  6. Step 6: Final answer
    x = 185,038.36

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1.5x scale

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.