Home / 500,285.28-690,386.82-273,930.78

Finding the Fourth Proportional to 500,285.28, 690,386.82 and 273,930.78

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Solution

The fourth proportional to 500,285.28, 690,386.82 and 273,930.78 is: 378,020.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,285.28 : 690,386.82 = 273,930.78 : x
  2. Step 2: Convert to fraction form
    500,285.28/690,386.82 = 273,930.78/x
  3. Step 3: Cross multiply
    500,285.28x = 690,386.82 × 273,930.78
  4. Step 4: Simplify right side
    500,285.28x = 189,118,200,104.32
  5. Step 5: Solve for x
    x = 189,118,200,104.32/500,285.28
  6. Step 6: Final answer
    x = 378,020.72

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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.