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Finding the Fourth Proportional to 500,481.36, 690,656.49 and 285,615.90

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Solution

The fourth proportional to 500,481.36, 690,656.49 and 285,615.90 is: 394,145.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,481.36 : 690,656.49 = 285,615.90 : x
  2. Step 2: Convert to fraction form
    500,481.36/690,656.49 = 285,615.90/x
  3. Step 3: Cross multiply
    500,481.36x = 690,656.49 × 285,615.90
  4. Step 4: Simplify right side
    500,481.36x = 197,262,474,982.19
  5. Step 5: Solve for x
    x = 197,262,474,982.19/500,481.36
  6. Step 6: Final answer
    x = 394,145.50

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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.