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Finding the Fourth Proportional to 422,659.40, 634,645.20 and 245,512.40

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Solution

The fourth proportional to 422,659.40, 634,645.20 and 245,512.40 is: 368,649.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,659.40 : 634,645.20 = 245,512.40 : x
  2. Step 2: Convert to fraction form
    422,659.40/634,645.20 = 245,512.40/x
  3. Step 3: Cross multiply
    422,659.40x = 634,645.20 × 245,512.40
  4. Step 4: Simplify right side
    422,659.40x = 155,813,266,200.48
  5. Step 5: Solve for x
    x = 155,813,266,200.48/422,659.40
  6. Step 6: Final answer
    x = 368,649.71

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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.