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Finding the Fourth Proportional to 425,636.40, 637,936.20 and 188,727.60

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Solution

The fourth proportional to 425,636.40, 637,936.20 and 188,727.60 is: 282,861.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,636.40 : 637,936.20 = 188,727.60 : x
  2. Step 2: Convert to fraction form
    425,636.40/637,936.20 = 188,727.60/x
  3. Step 3: Cross multiply
    425,636.40x = 637,936.20 × 188,727.60
  4. Step 4: Simplify right side
    425,636.40x = 120,396,167,979.12
  5. Step 5: Solve for x
    x = 120,396,167,979.12/425,636.40
  6. Step 6: Final answer
    x = 282,861.54

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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.