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Finding the Fourth Proportional to 500,243.48, 690,404.82 and 306,766.88

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Solution

The fourth proportional to 500,243.48, 690,404.82 and 306,766.88 is: 423,380.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,243.48 : 690,404.82 = 306,766.88 : x
  2. Step 2: Convert to fraction form
    500,243.48/690,404.82 = 306,766.88/x
  3. Step 3: Cross multiply
    500,243.48x = 690,404.82 × 306,766.88
  4. Step 4: Simplify right side
    500,243.48x = 211,793,332,568.36
  5. Step 5: Solve for x
    x = 211,793,332,568.36/500,243.48
  6. Step 6: Final answer
    x = 423,380.50

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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.