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Finding the Fourth Proportional to 500,697.33, 690,989.99 and 285,906.39

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Solution

The fourth proportional to 500,697.33, 690,989.99 and 285,906.39 is: 394,566.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,697.33 : 690,989.99 = 285,906.39 : x
  2. Step 2: Convert to fraction form
    500,697.33/690,989.99 = 285,906.39/x
  3. Step 3: Cross multiply
    500,697.33x = 690,989.99 × 285,906.39
  4. Step 4: Simplify right side
    500,697.33x = 197,558,452,137.50
  5. Step 5: Solve for x
    x = 197,558,452,137.50/500,697.33
  6. Step 6: Final answer
    x = 394,566.62

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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.