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Finding the Fourth Proportional to 500,313.28, 690,425.48 and 273,958.80

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Solution

The fourth proportional to 500,313.28, 690,425.48 and 273,958.80 is: 378,059.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,313.28 : 690,425.48 = 273,958.80 : x
  2. Step 2: Convert to fraction form
    500,313.28/690,425.48 = 273,958.80/x
  3. Step 3: Cross multiply
    500,313.28x = 690,425.48 × 273,958.80
  4. Step 4: Simplify right side
    500,313.28x = 189,148,135,990.22
  5. Step 5: Solve for x
    x = 189,148,135,990.22/500,313.28
  6. Step 6: Final answer
    x = 378,059.40

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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.