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Finding the Fourth Proportional to 500,136.72, 690,189.84 and 273,796.80

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Solution

The fourth proportional to 500,136.72, 690,189.84 and 273,796.80 is: 377,840.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,136.72 : 690,189.84 = 273,796.80 : x
  2. Step 2: Convert to fraction form
    500,136.72/690,189.84 = 273,796.80/x
  3. Step 3: Cross multiply
    500,136.72x = 690,189.84 × 273,796.80
  4. Step 4: Simplify right side
    500,136.72x = 188,971,769,584.51
  5. Step 5: Solve for x
    x = 188,971,769,584.51/500,136.72
  6. Step 6: Final answer
    x = 377,840.22

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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.