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Finding the Fourth Proportional to 422,915.96, 583,640.88 and 231,936.32

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Solution

The fourth proportional to 422,915.96, 583,640.88 and 231,936.32 is: 320,081.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,915.96 : 583,640.88 = 231,936.32 : x
  2. Step 2: Convert to fraction form
    422,915.96/583,640.88 = 231,936.32/x
  3. Step 3: Cross multiply
    422,915.96x = 583,640.88 × 231,936.32
  4. Step 4: Simplify right side
    422,915.96x = 135,367,517,908.76
  5. Step 5: Solve for x
    x = 135,367,517,908.76/422,915.96
  6. Step 6: Final answer
    x = 320,081.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.