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Finding the Fourth Proportional to 500,295.30, 690,400.62 and 273,940.80

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Solution

The fourth proportional to 500,295.30, 690,400.62 and 273,940.80 is: 378,034.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,295.30 : 690,400.62 = 273,940.80 : x
  2. Step 2: Convert to fraction form
    500,295.30/690,400.62 = 273,940.80/x
  3. Step 3: Cross multiply
    500,295.30x = 690,400.62 × 273,940.80
  4. Step 4: Simplify right side
    500,295.30x = 189,128,898,163.30
  5. Step 5: Solve for x
    x = 189,128,898,163.30/500,295.30
  6. Step 6: Final answer
    x = 378,034.53

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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.